Onyx High Back Ergonomic Posture Office Chair with Adjustable Arms
High back ergonomic posture office chair with a triple lever mechanism giving independent seat and back angle adjustment, a ratchet backrest, pump up lumbar support and seat slide. Contoured foam seat and back, height adjustable arms, brushed aluminium base. Rated for 24 hour use, 135kg capacity, optional headrest, 22 upholstery choices.
Description
Three levers, every angle covered
Contoured comfort, pumped to fit
Finished your way
Right for your business
Seat
Gas seat height adjustment, 49.5cm to 57cm. A tall range that suits standard and higher desks alike, keeping feet flat and thighs level.
Seat slide with a 46cm to 51cm depth range. Slide the seat forwards or back so legs get full support without pressure behind the knees.
Seat angle adjustment, 1 to 15 degrees. Tip the seat to open the hip angle and take pressure off the lower back.
44cm wide contoured foam seat. Shaped support that keeps its form through long working days.
Backrest and posture support
Ratchet height adjustable high back, 43cm wide. Clicks up and down so support sits exactly where your spine needs it.
Back angle adjustment, 1 to 20 degrees. Set the backrest angle independently of the seat for a genuinely tailored position.
Permanent contact backrest. Stays in touch with your back as you move, supporting rather than waiting for you to lean back.
Pump up lumbar support. Inflate the lower back support until the firmness is exactly right for you.
Optional headrest. Choose the chair with or without neck support for long stints at the desk.
Armrests and base
Height adjustable arms, 63.5cm to 73.5cm. Keep elbows supported at desk height and shoulders relaxed.
Removable arms. Take them off entirely for armless sitting or to pull fully under the desk.
Brushed aluminium five star base. A smart, sturdy foundation that looks as good as it rolls.
Size, capacity and usage
65cm wide, 67cm deep footprint. Full-size posture support that still fits a normal workstation.
135kg maximum weight capacity. A heavy duty rating, comfortably above the standard office chair.
Recommended for 24 hour use. Built and rated for continuous sitting, not just the working day.
UK Crib 5 foam and fabric. Contract-grade materials specification throughout the upholstery.
Guarantee
5 year guarantee on mechanical components, 2 years on fabric and foam. Long cover on the moving parts, so the chair is still doing its job years from now.
More chairs built around good posture in our ergonomic office chairs range.
Specification
| Overall Width | 65cm |
| Overall Depth | 67cm |
| Overall Height | 102cm - 143cm |
| Product Weight | 22kg - 23kg |
| Maximum Weight Capacity | 135kg |
| Recommended Usage | 24 hours |
| Material | Fabric & Chrome Metal, Soft Bonded Leather & Chrome Metal |
| Finish | 41 choices - select your options to see yours |
| Colour | 29 choices - select your options to see yours |
| Bespoke Brand | Camira |
| Range | Phoenix, Xtreme, Rivet, Quest |
| Seat Width | 44cm |
| Seat Depth | 46-51cm |
| Seat Height | 49.5-57cm |
| Gas Height Adjustment | Yes |
| Back Type | High |
| Back Width | 43cm |
| Back Height | 53cm - 84cm |
| Height Adjustable Back | Yes |
| Permanent Contact Backrest | Yes |
| Independent Seat & Back | Yes |
| Integral Lumbar Support | Yes |
| Adjustable Lumbar Support | Yes |
| Headrest Included | Yes, No |
| Headrest Type | Adjustable |
| Adjustable Headrest | Yes |
| Arms Included | Yes |
| Arm Type | Height Adjustable |
| Arms Removable | Yes |
| Arm Width | 45cm |
| Arm Height | 63.5-73.5cm |
| Seat Slide | Yes |
| Seat Angle Adjustment | Yes |
| Seat Depth Adjustment | Yes, No |
| Tilt Tension Adjustment | Yes |
| Mechanical Components | 5 Years |
| Fabric & Foam | 2 Years |
Downloads
Reviews
- 5 out of 5Damian29 April 2026
Sorted my posture
Proper posture chair with independent adjustments and arms that move. Took an afternoon of fiddling to get it right and it has been comfortable ever since. My back has thanked me.
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