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Onyx Ergo Leather Posture Chair in Black With Arms

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Posture Chair

  • Colour: Black
  • Bonded Leather
  • Contoured foam seat and backrest for maximum user comfort
  • Triple lever multi-function mechanism
  • Ratchet height adjustable backrest
  • Pump up lumbar support
  • Seat slide
  • Height adjustable arms
  • Brushed aluminium 5 star base
  • UK crib 5 foam and fabric
  • Gas lift tested up to: 150 kg
  • Usage: 24 hours
  • Overall Width: 610mm
  • Overall Depth: 670mm
  • Overall Height: 1210mm

£467.00£490.00 Inc. VAT


Posture Chair

The Onyx chair is a fresh, contemporary office chair that offers a range of inspired features such as a multi-functional asynchronous mechanism with multiple adjustments and a contoured foam seat and back for extra support and comfort. The Onyx is a top choice for a posture chair. Available in black or blue fabric and bonded leather upholstery options. Optional headrest variant available.

  • Flat Packed or Pre-Assembled: Flat Packed
  • Colour: Black
  • Material: Bonded Leather
  • Crib 5 Foam & Fabric: Yes
  • Back Type: High
  • Recommended Usage (Hours): 24
  • Max Weight Capacity (KG): 135
  • Mechanical Guarantee (Years): 5
  • Fabric & Foam Guarantee (Years): 2
  • Seat Width (MM): 450
  • Seat Depth (MM): 470-540
  • Seat Height (MM): 490-590
  • Back Width (MM): 430
  • Back Height for with Headrest (MM): 670-850
  • Back Height for without Headrest (MM): 590-640
  • Arm Width (MM): 445
  • Arm Height (MM): 660-760
  • Overall Width (MM): 610
  • Overall Depth (MM): 670
  • Overall Height (MM): 1210
  • Product Weight for With Headrest (KG): 23
  • Product Weight for Without Headrest (KG): 22
  • Arms Included: Yes
  • Arm Type (If Included): Height Adjustable
  • Arms Removable: Yes
  • Headrest Type: Height adjustable
  • Stackable: No
  • Mech: Gas Height Adjustment: Yes
  • Mech: Independent Seat & Back: Yes
  • Mech: Synchro Tilt: No
  • Mech: Infinite Lock Mechanism: No
  • Mech: Lock Tilt Motion: No
  • Mech: Knee Tilt: No
  • Mech: Permanent Contact Backrest: Yes
  • Mech: Tilt Tension Adjustment: Yes
  • Mech: Auto Tilt Tension Adjustment: No
  • Mech: Anti-shock: No
  • Mech: Seat Slide: Yes
  • Mech: Seat Angle Adjustment: Yes
  • Mech: Seat Depth Adjustment: Yes
  • Height Adjustable Back: Yes
  • Integral Lumbar Support: Yes
  • Adjustable Lumbar Support: Yes
  • Adjustable Headrest: Yes
  • Folding Armrest: No


Onyx-Ergo-Posture-Chair-Black-Bonded-Leather-With-Headrest-With-Arms PN: OP000098

Onyx-Ergo-Posture-Chair-Black-Bonded-Leather-Without-Headrest-With-Arms PN: OP000099


Browse our full range of Office Chairs here.

Additional information

Weight 28 kg
Dimensions 9.4 × 65 × 3.9 cm
Product Type










Suggested Usage Time


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