Dark grey mesh office chair with cushioned seat, curved armrests and five-star wheeled base isolated on a white background.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: High-Capacity 135kg Mesh Operator Seating

Equip your workforce with a seating solution that punches well above its weight class. Combining an ultra-lightweight nylon architecture with a reinforced pneumatic cylinder, this chair delivers heavy-duty 135kg performance without adding unnecessary bulk to your office floorplan.

Structural Superiority

  • 135kg Heavy-Duty Rating: Unlike standard task chairs that cap at 110kg, this model utilises enhanced internal components to comfortably and safely support users up to roughly 21 stone.
  • Fixed Integrated Armrests: Engineered to provide a permanent, unyielding resting place for the forearms. This static support drastically minimises the muscular load placed on the neck and shoulders during prolonged keyboard operation.
  • Unique Sculpted Backrest: The carefully contoured back frame is wrapped in a high-tension mesh weave, delivering targeted lumbar pressure while ensuring vital body heat escapes rather than pooling against the spine.

Fluid Adjustability

  • Single-Lever Operation: Simplify your setup. A single, easily accessible lever handles both the vertical gas lift adjustments and the engagement of the upright tilt-lock, removing the confusion of multi-paddle systems.
  • Dial-Controlled Tension: A dedicated rotary knob situated beneath the seat pan lets the occupant dictate the stiffness of the recline. This ensures the backward pivot is perfectly balanced against their specific body mass.
  • 8-Hour Operational Comfort: The combination of commercial-grade seat foam and an anatomically correct frame geometry guarantees that the chair will not bottom out or cause discomfort during a standard full-time shift.

The Cobolt Promise

  • Zero-Cost Mainland Freight: We absorb all shipping charges for mainland UK drops, guaranteeing that your departmental budget goes entirely toward the product itself.
  • Five Decades of Industry Leadership: With 50 years of experience serving British institutions, we bypass fragile retail furniture to focus entirely on robust, B2B-grade solutions.
  • Domestic Manufacturing: Produced right here in the United Kingdom, this chair supports local supply chains, drastically lowers import carbon footprints, and ensures meticulous quality control.

Optimal Environments for the 135kg Mesh Task Chair

The Black Mesh Task Operator Chair is the definitive choice for Busy Call Centres, University Computer Labs, and Multi-Shift Security Hubs. Because of its massive 135kg threshold and low 11.2kg weight, it is particularly effective for Hot-Desking Zones where staff of varying statures share the same equipment.

Key Features

  • 135kg Enhanced Payload — Upgraded structural components comfortably accommodate heavier users without risking mechanical failure.
  • Distinctive Mesh Back Profile — A highly ventilated, uniquely shaped frame that provides consistent lumbar contact.
  • Single-Lever Mechanism — One control point for raising/lowering the seat and engaging the tilt-lock function.
  • Manual Weight Tensioner — Tailor the push-back resistance of the chair to ensure a safe, smooth reclining action.
  • Rigid Upright Lock — Freeze the backrest in a strict 90-degree position for tasks demanding high concentration.
  • Static Nylon Armrests — Solid lateral barriers that relieve upper body tension over an 8-hour working period.
  • Dual Guarantee System — 3 years of coverage for the hardware, plus 1 year for the textile and foam elements.
  • UK Manufactured — Built domestically to satisfy the rigorous demands of the British commercial sector.
Warranty icon
3-year mechanical / 1-year fabric guarantee
Free delivery icon
Free UK Mainland Delivery
UK Made icon
Made in the UK

Cobolt Service & Ethos: Partnering with Educational & Commercial Estates

  • Exclusive B2B Sourcing: We deliberately avoid light-duty home office chairs, ensuring your procurement team only buys units engineered for constant public and staff usage.
  • Occupational Health Alignment: By supporting 135kg and providing essential lumbar/arm support, this chair assists facilities in meeting their workstation safety obligations.
  • Streamlined Logistics: Utilising a dedicated commercial transport network guarantees your items are handled with care and arrive ready for deployment.

Occupational Health & Dependability.

  • The heavy-duty Pneumatic Cylinder has been rigorously load-tested to safely bear up to 135kg without sinking or failing over time.
  • The robust Single-Lever Lock acts as a fail-safe, firmly anchoring the backrest in a vertical state to prevent unwanted motion during intricate desktop work.
  • The adjustable Tension Dial is a critical preventative measure, stopping lighter individuals from being thrown backward when the chair is unlocked.
  • Its unyielding Fixed Armrests are bolted directly into the chassis, guaranteeing they will not snap or warp when users lean heavily on them to stand up.
  • We safeguard your investment with a 3-year mechanical hardware guarantee, operating alongside a 1-year shield for the mesh, foam, and fabric coverings.

A high-capacity, 135kg-rated mesh operator chair featuring a single-lever mechanism, fixed armrests, and British-built durability.

Max Load
135kg
Hardware Warranty
3 Years
Origin
Made in UK
Specification
Dimensions
Purpose / Benefit
Overall Height
950mm - 1045mm
Provides mid-level thoracic support without obscuring open-plan sightlines
Seat Elevation
420mm - 515mm
Accommodates varied leg lengths to ensure feet rest entirely flat on the floor
Seat Proportions
485mm(W) x 490mm(D)
A generous seating pan that prevents restriction of blood flow to the lower limbs
Backrest Dimensions
455mm(H) x 540mm(W)
An unusually wide back profile offering superior lateral capture for broader users
Armrest Clearance
615mm(W) | 460mm(H)
Wide internal stance designed to grant larger occupants plenty of breathing room
Mechanism Type
Single Lever / Upright Lock
Consolidates elevation and tilt functions into one highly intuitive control point
Material Composition
Nylon, Mesh & Fabric
Yields an incredibly strong yet lightweight frame that breathes effortlessly
Total Mass
11.2kg
Highly manoeuvrable on castors, minimising floor damage and user fatigue

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Frequently Asked Questions

1. How does this chair support 135kg when it only weighs 11.2kg?

A: The chair achieves its high payload through advanced material engineering. The wheelbase and frame utilise high-density nylon polymers, and the core gas strut is heavily reinforced, delivering immense strength without the weight penalty of solid steel.

2. Is the single-lever mechanism complicated to operate?

A: Not at all; it is actually simpler than traditional setups. Pulling the lever up adjusts your seat height, while pushing the lever inward or pulling it outward engages or disengages the tilt lock.

3. Can I lock the backrest at any angle I choose?

A: No. This unit utilises an upright locking mechanism. You can enjoy a fluid backward motion when the lock is disengaged, but it will only freeze securely into place when positioned vertically at 90 degrees.

4. What makes the mesh backrest "uniquely designed"?

A: The back frame is much wider (540mm) than standard models and sculpted with a specific lumbar curvature. This allows the high-tension mesh to stretch optimally, providing firm lateral and lower-spine support without needing a bulky foam pad.

5. Will the fixed arms collide with my office desk?

A: The armrests sit at 460mm above the seat pan. When combined with the chair's overall height adjustment, they are scaled to slide neatly beneath the vast majority of standard 720mm-high UK work surfaces.

6. What is the purpose of the weight tensioner dial?

A: The tensioner dictates how stiff the chair feels when leaning back. A heavier person will want to tighten the dial for more resistance, whereas a lighter person should loosen it so they don't have to force the chair backward.

7. Are the castors safe for hard floors?

A: The supplied twin-wheel castors are designed for standard office use, which includes low-pile carpets and robust vinyl tiles. If you have highly polished wooden floors, we recommend a protective mat.

8. What exactly is protected under the 3-year mechanical guarantee?

A: The 3-year warranty comprehensively covers the structural hardware—this includes the gas cylinder, the five-star wheelbase, the castors, and the internal metal tilt mechanism. The fabric and foam are covered separately for 1 year.

Overview

Product Overview: High-Capacity 135kg Mesh Operator Seating

Equip your workforce with a seating solution that punches well above its weight class. Combining an ultra-lightweight nylon architecture with a reinforced pneumatic cylinder, this chair delivers heavy-duty 135kg performance without adding unnecessary bulk to your office floorplan.

Structural Superiority

  • 135kg Heavy-Duty Rating: Unlike standard task chairs that cap at 110kg, this model utilises enhanced internal components to comfortably and safely support users up to roughly 21 stone.
  • Fixed Integrated Armrests: Engineered to provide a permanent, unyielding resting place for the forearms. This static support drastically minimises the muscular load placed on the neck and shoulders during prolonged keyboard operation.
  • Unique Sculpted Backrest: The carefully contoured back frame is wrapped in a high-tension mesh weave, delivering targeted lumbar pressure while ensuring vital body heat escapes rather than pooling against the spine.

Fluid Adjustability

  • Single-Lever Operation: Simplify your setup. A single, easily accessible lever handles both the vertical gas lift adjustments and the engagement of the upright tilt-lock, removing the confusion of multi-paddle systems.
  • Dial-Controlled Tension: A dedicated rotary knob situated beneath the seat pan lets the occupant dictate the stiffness of the recline. This ensures the backward pivot is perfectly balanced against their specific body mass.
  • 8-Hour Operational Comfort: The combination of commercial-grade seat foam and an anatomically correct frame geometry guarantees that the chair will not bottom out or cause discomfort during a standard full-time shift.

The Cobolt Promise

  • Zero-Cost Mainland Freight: We absorb all shipping charges for mainland UK drops, guaranteeing that your departmental budget goes entirely toward the product itself.
  • Five Decades of Industry Leadership: With 50 years of experience serving British institutions, we bypass fragile retail furniture to focus entirely on robust, B2B-grade solutions.
  • Domestic Manufacturing: Produced right here in the United Kingdom, this chair supports local supply chains, drastically lowers import carbon footprints, and ensures meticulous quality control.

Features & Benefits

Optimal Environments for the 135kg Mesh Task Chair

The Black Mesh Task Operator Chair is the definitive choice for Busy Call Centres, University Computer Labs, and Multi-Shift Security Hubs. Because of its massive 135kg threshold and low 11.2kg weight, it is particularly effective for Hot-Desking Zones where staff of varying statures share the same equipment.

Key Features

  • 135kg Enhanced Payload — Upgraded structural components comfortably accommodate heavier users without risking mechanical failure.
  • Distinctive Mesh Back Profile — A highly ventilated, uniquely shaped frame that provides consistent lumbar contact.
  • Single-Lever Mechanism — One control point for raising/lowering the seat and engaging the tilt-lock function.
  • Manual Weight Tensioner — Tailor the push-back resistance of the chair to ensure a safe, smooth reclining action.
  • Rigid Upright Lock — Freeze the backrest in a strict 90-degree position for tasks demanding high concentration.
  • Static Nylon Armrests — Solid lateral barriers that relieve upper body tension over an 8-hour working period.
  • Dual Guarantee System — 3 years of coverage for the hardware, plus 1 year for the textile and foam elements.
  • UK Manufactured — Built domestically to satisfy the rigorous demands of the British commercial sector.
Warranty icon
3-year mechanical / 1-year fabric guarantee
Free delivery icon
Free UK Mainland Delivery
UK Made icon
Made in the UK

Cobolt Service & Ethos: Partnering with Educational & Commercial Estates

  • Exclusive B2B Sourcing: We deliberately avoid light-duty home office chairs, ensuring your procurement team only buys units engineered for constant public and staff usage.
  • Occupational Health Alignment: By supporting 135kg and providing essential lumbar/arm support, this chair assists facilities in meeting their workstation safety obligations.
  • Streamlined Logistics: Utilising a dedicated commercial transport network guarantees your items are handled with care and arrive ready for deployment.

Safety & Warranty

Occupational Health & Dependability.

  • The heavy-duty Pneumatic Cylinder has been rigorously load-tested to safely bear up to 135kg without sinking or failing over time.
  • The robust Single-Lever Lock acts as a fail-safe, firmly anchoring the backrest in a vertical state to prevent unwanted motion during intricate desktop work.
  • The adjustable Tension Dial is a critical preventative measure, stopping lighter individuals from being thrown backward when the chair is unlocked.
  • Its unyielding Fixed Armrests are bolted directly into the chassis, guaranteeing they will not snap or warp when users lean heavily on them to stand up.
  • We safeguard your investment with a 3-year mechanical hardware guarantee, operating alongside a 1-year shield for the mesh, foam, and fabric coverings.

Specification Dimensions

A high-capacity, 135kg-rated mesh operator chair featuring a single-lever mechanism, fixed armrests, and British-built durability.

Max Load
135kg
Hardware Warranty
3 Years
Origin
Made in UK
Specification
Dimensions
Purpose / Benefit
Overall Height
950mm - 1045mm
Provides mid-level thoracic support without obscuring open-plan sightlines
Seat Elevation
420mm - 515mm
Accommodates varied leg lengths to ensure feet rest entirely flat on the floor
Seat Proportions
485mm(W) x 490mm(D)
A generous seating pan that prevents restriction of blood flow to the lower limbs
Backrest Dimensions
455mm(H) x 540mm(W)
An unusually wide back profile offering superior lateral capture for broader users
Armrest Clearance
615mm(W) | 460mm(H)
Wide internal stance designed to grant larger occupants plenty of breathing room
Mechanism Type
Single Lever / Upright Lock
Consolidates elevation and tilt functions into one highly intuitive control point
Material Composition
Nylon, Mesh & Fabric
Yields an incredibly strong yet lightweight frame that breathes effortlessly
Total Mass
11.2kg
Highly manoeuvrable on castors, minimising floor damage and user fatigue

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

Frequently Asked Questions

1. How does this chair support 135kg when it only weighs 11.2kg?

A: The chair achieves its high payload through advanced material engineering. The wheelbase and frame utilise high-density nylon polymers, and the core gas strut is heavily reinforced, delivering immense strength without the weight penalty of solid steel.

2. Is the single-lever mechanism complicated to operate?

A: Not at all; it is actually simpler than traditional setups. Pulling the lever up adjusts your seat height, while pushing the lever inward or pulling it outward engages or disengages the tilt lock.

3. Can I lock the backrest at any angle I choose?

A: No. This unit utilises an upright locking mechanism. You can enjoy a fluid backward motion when the lock is disengaged, but it will only freeze securely into place when positioned vertically at 90 degrees.

4. What makes the mesh backrest "uniquely designed"?

A: The back frame is much wider (540mm) than standard models and sculpted with a specific lumbar curvature. This allows the high-tension mesh to stretch optimally, providing firm lateral and lower-spine support without needing a bulky foam pad.

5. Will the fixed arms collide with my office desk?

A: The armrests sit at 460mm above the seat pan. When combined with the chair's overall height adjustment, they are scaled to slide neatly beneath the vast majority of standard 720mm-high UK work surfaces.

6. What is the purpose of the weight tensioner dial?

A: The tensioner dictates how stiff the chair feels when leaning back. A heavier person will want to tighten the dial for more resistance, whereas a lighter person should loosen it so they don't have to force the chair backward.

7. Are the castors safe for hard floors?

A: The supplied twin-wheel castors are designed for standard office use, which includes low-pile carpets and robust vinyl tiles. If you have highly polished wooden floors, we recommend a protective mat.

8. What exactly is protected under the 3-year mechanical guarantee?

A: The 3-year warranty comprehensively covers the structural hardware—this includes the gas cylinder, the five-star wheelbase, the castors, and the internal metal tilt mechanism. The fabric and foam are covered separately for 1 year.

Black Mesh Task Operator Chair with Arms

Product code: OC356DK
Fortify your corporate or campus workstations with the Black Mesh Task Operator Chair with Arms. Purpose-built for demanding daily routines, this loca...

Inc VAT

Exc VAT

£149.00

£124.17

Colour - Black

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: High-Capacity 135kg Mesh Operator Seating

Equip your workforce with a seating solution that punches well above its weight class. Combining an ultra-lightweight nylon architecture with a reinforced pneumatic cylinder, this chair delivers heavy-duty 135kg performance without adding unnecessary bulk to your office floorplan.

Structural Superiority

  • 135kg Heavy-Duty Rating: Unlike standard task chairs that cap at 110kg, this model utilises enhanced internal components to comfortably and safely support users up to roughly 21 stone.
  • Fixed Integrated Armrests: Engineered to provide a permanent, unyielding resting place for the forearms. This static support drastically minimises the muscular load placed on the neck and shoulders during prolonged keyboard operation.
  • Unique Sculpted Backrest: The carefully contoured back frame is wrapped in a high-tension mesh weave, delivering targeted lumbar pressure while ensuring vital body heat escapes rather than pooling against the spine.

Fluid Adjustability

  • Single-Lever Operation: Simplify your setup. A single, easily accessible lever handles both the vertical gas lift adjustments and the engagement of the upright tilt-lock, removing the confusion of multi-paddle systems.
  • Dial-Controlled Tension: A dedicated rotary knob situated beneath the seat pan lets the occupant dictate the stiffness of the recline. This ensures the backward pivot is perfectly balanced against their specific body mass.
  • 8-Hour Operational Comfort: The combination of commercial-grade seat foam and an anatomically correct frame geometry guarantees that the chair will not bottom out or cause discomfort during a standard full-time shift.

The Cobolt Promise

  • Zero-Cost Mainland Freight: We absorb all shipping charges for mainland UK drops, guaranteeing that your departmental budget goes entirely toward the product itself.
  • Five Decades of Industry Leadership: With 50 years of experience serving British institutions, we bypass fragile retail furniture to focus entirely on robust, B2B-grade solutions.
  • Domestic Manufacturing: Produced right here in the United Kingdom, this chair supports local supply chains, drastically lowers import carbon footprints, and ensures meticulous quality control.

Optimal Environments for the 135kg Mesh Task Chair

The Black Mesh Task Operator Chair is the definitive choice for Busy Call Centres, University Computer Labs, and Multi-Shift Security Hubs. Because of its massive 135kg threshold and low 11.2kg weight, it is particularly effective for Hot-Desking Zones where staff of varying statures share the same equipment.

Key Features

  • 135kg Enhanced Payload — Upgraded structural components comfortably accommodate heavier users without risking mechanical failure.
  • Distinctive Mesh Back Profile — A highly ventilated, uniquely shaped frame that provides consistent lumbar contact.
  • Single-Lever Mechanism — One control point for raising/lowering the seat and engaging the tilt-lock function.
  • Manual Weight Tensioner — Tailor the push-back resistance of the chair to ensure a safe, smooth reclining action.
  • Rigid Upright Lock — Freeze the backrest in a strict 90-degree position for tasks demanding high concentration.
  • Static Nylon Armrests — Solid lateral barriers that relieve upper body tension over an 8-hour working period.
  • Dual Guarantee System — 3 years of coverage for the hardware, plus 1 year for the textile and foam elements.
  • UK Manufactured — Built domestically to satisfy the rigorous demands of the British commercial sector.
Warranty icon
3-year mechanical / 1-year fabric guarantee
Free delivery icon
Free UK Mainland Delivery
UK Made icon
Made in the UK

Cobolt Service & Ethos: Partnering with Educational & Commercial Estates

  • Exclusive B2B Sourcing: We deliberately avoid light-duty home office chairs, ensuring your procurement team only buys units engineered for constant public and staff usage.
  • Occupational Health Alignment: By supporting 135kg and providing essential lumbar/arm support, this chair assists facilities in meeting their workstation safety obligations.
  • Streamlined Logistics: Utilising a dedicated commercial transport network guarantees your items are handled with care and arrive ready for deployment.

Occupational Health & Dependability.

  • The heavy-duty Pneumatic Cylinder has been rigorously load-tested to safely bear up to 135kg without sinking or failing over time.
  • The robust Single-Lever Lock acts as a fail-safe, firmly anchoring the backrest in a vertical state to prevent unwanted motion during intricate desktop work.
  • The adjustable Tension Dial is a critical preventative measure, stopping lighter individuals from being thrown backward when the chair is unlocked.
  • Its unyielding Fixed Armrests are bolted directly into the chassis, guaranteeing they will not snap or warp when users lean heavily on them to stand up.
  • We safeguard your investment with a 3-year mechanical hardware guarantee, operating alongside a 1-year shield for the mesh, foam, and fabric coverings.

A high-capacity, 135kg-rated mesh operator chair featuring a single-lever mechanism, fixed armrests, and British-built durability.

Max Load
135kg
Hardware Warranty
3 Years
Origin
Made in UK
Specification
Dimensions
Purpose / Benefit
Overall Height
950mm - 1045mm
Provides mid-level thoracic support without obscuring open-plan sightlines
Seat Elevation
420mm - 515mm
Accommodates varied leg lengths to ensure feet rest entirely flat on the floor
Seat Proportions
485mm(W) x 490mm(D)
A generous seating pan that prevents restriction of blood flow to the lower limbs
Backrest Dimensions
455mm(H) x 540mm(W)
An unusually wide back profile offering superior lateral capture for broader users
Armrest Clearance
615mm(W) | 460mm(H)
Wide internal stance designed to grant larger occupants plenty of breathing room
Mechanism Type
Single Lever / Upright Lock
Consolidates elevation and tilt functions into one highly intuitive control point
Material Composition
Nylon, Mesh & Fabric
Yields an incredibly strong yet lightweight frame that breathes effortlessly
Total Mass
11.2kg
Highly manoeuvrable on castors, minimising floor damage and user fatigue

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Frequently Asked Questions

1. How does this chair support 135kg when it only weighs 11.2kg?

A: The chair achieves its high payload through advanced material engineering. The wheelbase and frame utilise high-density nylon polymers, and the core gas strut is heavily reinforced, delivering immense strength without the weight penalty of solid steel.

2. Is the single-lever mechanism complicated to operate?

A: Not at all; it is actually simpler than traditional setups. Pulling the lever up adjusts your seat height, while pushing the lever inward or pulling it outward engages or disengages the tilt lock.

3. Can I lock the backrest at any angle I choose?

A: No. This unit utilises an upright locking mechanism. You can enjoy a fluid backward motion when the lock is disengaged, but it will only freeze securely into place when positioned vertically at 90 degrees.

4. What makes the mesh backrest "uniquely designed"?

A: The back frame is much wider (540mm) than standard models and sculpted with a specific lumbar curvature. This allows the high-tension mesh to stretch optimally, providing firm lateral and lower-spine support without needing a bulky foam pad.

5. Will the fixed arms collide with my office desk?

A: The armrests sit at 460mm above the seat pan. When combined with the chair's overall height adjustment, they are scaled to slide neatly beneath the vast majority of standard 720mm-high UK work surfaces.

6. What is the purpose of the weight tensioner dial?

A: The tensioner dictates how stiff the chair feels when leaning back. A heavier person will want to tighten the dial for more resistance, whereas a lighter person should loosen it so they don't have to force the chair backward.

7. Are the castors safe for hard floors?

A: The supplied twin-wheel castors are designed for standard office use, which includes low-pile carpets and robust vinyl tiles. If you have highly polished wooden floors, we recommend a protective mat.

8. What exactly is protected under the 3-year mechanical guarantee?

A: The 3-year warranty comprehensively covers the structural hardware—this includes the gas cylinder, the five-star wheelbase, the castors, and the internal metal tilt mechanism. The fabric and foam are covered separately for 1 year.

Overview

Product Overview: High-Capacity 135kg Mesh Operator Seating

Equip your workforce with a seating solution that punches well above its weight class. Combining an ultra-lightweight nylon architecture with a reinforced pneumatic cylinder, this chair delivers heavy-duty 135kg performance without adding unnecessary bulk to your office floorplan.

Structural Superiority

  • 135kg Heavy-Duty Rating: Unlike standard task chairs that cap at 110kg, this model utilises enhanced internal components to comfortably and safely support users up to roughly 21 stone.
  • Fixed Integrated Armrests: Engineered to provide a permanent, unyielding resting place for the forearms. This static support drastically minimises the muscular load placed on the neck and shoulders during prolonged keyboard operation.
  • Unique Sculpted Backrest: The carefully contoured back frame is wrapped in a high-tension mesh weave, delivering targeted lumbar pressure while ensuring vital body heat escapes rather than pooling against the spine.

Fluid Adjustability

  • Single-Lever Operation: Simplify your setup. A single, easily accessible lever handles both the vertical gas lift adjustments and the engagement of the upright tilt-lock, removing the confusion of multi-paddle systems.
  • Dial-Controlled Tension: A dedicated rotary knob situated beneath the seat pan lets the occupant dictate the stiffness of the recline. This ensures the backward pivot is perfectly balanced against their specific body mass.
  • 8-Hour Operational Comfort: The combination of commercial-grade seat foam and an anatomically correct frame geometry guarantees that the chair will not bottom out or cause discomfort during a standard full-time shift.

The Cobolt Promise

  • Zero-Cost Mainland Freight: We absorb all shipping charges for mainland UK drops, guaranteeing that your departmental budget goes entirely toward the product itself.
  • Five Decades of Industry Leadership: With 50 years of experience serving British institutions, we bypass fragile retail furniture to focus entirely on robust, B2B-grade solutions.
  • Domestic Manufacturing: Produced right here in the United Kingdom, this chair supports local supply chains, drastically lowers import carbon footprints, and ensures meticulous quality control.

Features & Benefits

Optimal Environments for the 135kg Mesh Task Chair

The Black Mesh Task Operator Chair is the definitive choice for Busy Call Centres, University Computer Labs, and Multi-Shift Security Hubs. Because of its massive 135kg threshold and low 11.2kg weight, it is particularly effective for Hot-Desking Zones where staff of varying statures share the same equipment.

Key Features

  • 135kg Enhanced Payload — Upgraded structural components comfortably accommodate heavier users without risking mechanical failure.
  • Distinctive Mesh Back Profile — A highly ventilated, uniquely shaped frame that provides consistent lumbar contact.
  • Single-Lever Mechanism — One control point for raising/lowering the seat and engaging the tilt-lock function.
  • Manual Weight Tensioner — Tailor the push-back resistance of the chair to ensure a safe, smooth reclining action.
  • Rigid Upright Lock — Freeze the backrest in a strict 90-degree position for tasks demanding high concentration.
  • Static Nylon Armrests — Solid lateral barriers that relieve upper body tension over an 8-hour working period.
  • Dual Guarantee System — 3 years of coverage for the hardware, plus 1 year for the textile and foam elements.
  • UK Manufactured — Built domestically to satisfy the rigorous demands of the British commercial sector.
Warranty icon
3-year mechanical / 1-year fabric guarantee
Free delivery icon
Free UK Mainland Delivery
UK Made icon
Made in the UK

Cobolt Service & Ethos: Partnering with Educational & Commercial Estates

  • Exclusive B2B Sourcing: We deliberately avoid light-duty home office chairs, ensuring your procurement team only buys units engineered for constant public and staff usage.
  • Occupational Health Alignment: By supporting 135kg and providing essential lumbar/arm support, this chair assists facilities in meeting their workstation safety obligations.
  • Streamlined Logistics: Utilising a dedicated commercial transport network guarantees your items are handled with care and arrive ready for deployment.

Safety & Warranty

Occupational Health & Dependability.

  • The heavy-duty Pneumatic Cylinder has been rigorously load-tested to safely bear up to 135kg without sinking or failing over time.
  • The robust Single-Lever Lock acts as a fail-safe, firmly anchoring the backrest in a vertical state to prevent unwanted motion during intricate desktop work.
  • The adjustable Tension Dial is a critical preventative measure, stopping lighter individuals from being thrown backward when the chair is unlocked.
  • Its unyielding Fixed Armrests are bolted directly into the chassis, guaranteeing they will not snap or warp when users lean heavily on them to stand up.
  • We safeguard your investment with a 3-year mechanical hardware guarantee, operating alongside a 1-year shield for the mesh, foam, and fabric coverings.

Specification Dimensions

A high-capacity, 135kg-rated mesh operator chair featuring a single-lever mechanism, fixed armrests, and British-built durability.

Max Load
135kg
Hardware Warranty
3 Years
Origin
Made in UK
Specification
Dimensions
Purpose / Benefit
Overall Height
950mm - 1045mm
Provides mid-level thoracic support without obscuring open-plan sightlines
Seat Elevation
420mm - 515mm
Accommodates varied leg lengths to ensure feet rest entirely flat on the floor
Seat Proportions
485mm(W) x 490mm(D)
A generous seating pan that prevents restriction of blood flow to the lower limbs
Backrest Dimensions
455mm(H) x 540mm(W)
An unusually wide back profile offering superior lateral capture for broader users
Armrest Clearance
615mm(W) | 460mm(H)
Wide internal stance designed to grant larger occupants plenty of breathing room
Mechanism Type
Single Lever / Upright Lock
Consolidates elevation and tilt functions into one highly intuitive control point
Material Composition
Nylon, Mesh & Fabric
Yields an incredibly strong yet lightweight frame that breathes effortlessly
Total Mass
11.2kg
Highly manoeuvrable on castors, minimising floor damage and user fatigue

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

Frequently Asked Questions

1. How does this chair support 135kg when it only weighs 11.2kg?

A: The chair achieves its high payload through advanced material engineering. The wheelbase and frame utilise high-density nylon polymers, and the core gas strut is heavily reinforced, delivering immense strength without the weight penalty of solid steel.

2. Is the single-lever mechanism complicated to operate?

A: Not at all; it is actually simpler than traditional setups. Pulling the lever up adjusts your seat height, while pushing the lever inward or pulling it outward engages or disengages the tilt lock.

3. Can I lock the backrest at any angle I choose?

A: No. This unit utilises an upright locking mechanism. You can enjoy a fluid backward motion when the lock is disengaged, but it will only freeze securely into place when positioned vertically at 90 degrees.

4. What makes the mesh backrest "uniquely designed"?

A: The back frame is much wider (540mm) than standard models and sculpted with a specific lumbar curvature. This allows the high-tension mesh to stretch optimally, providing firm lateral and lower-spine support without needing a bulky foam pad.

5. Will the fixed arms collide with my office desk?

A: The armrests sit at 460mm above the seat pan. When combined with the chair's overall height adjustment, they are scaled to slide neatly beneath the vast majority of standard 720mm-high UK work surfaces.

6. What is the purpose of the weight tensioner dial?

A: The tensioner dictates how stiff the chair feels when leaning back. A heavier person will want to tighten the dial for more resistance, whereas a lighter person should loosen it so they don't have to force the chair backward.

7. Are the castors safe for hard floors?

A: The supplied twin-wheel castors are designed for standard office use, which includes low-pile carpets and robust vinyl tiles. If you have highly polished wooden floors, we recommend a protective mat.

8. What exactly is protected under the 3-year mechanical guarantee?

A: The 3-year warranty comprehensively covers the structural hardware—this includes the gas cylinder, the five-star wheelbase, the castors, and the internal metal tilt mechanism. The fabric and foam are covered separately for 1 year.

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