Grahl Duo-Back 11

About This Product

This chair comes with seat slide and seat tilt as standard.

Some images may include optional extras. See options below.

Price £649.00 (Ex VAT)
Fabric Colour: Black
Optional Installation, Set Up and Training

Select this option to get the most from your purchase. One of our highly trained IST team will deliver the chair, show you what the knobs and levers do, explain good posture and demonstrate how to adjust everything for maximum comfort so that you can do it yourself in future.


A unique, two-part back rest that reduces pressure on the spine. 

The Grahl Duo-Back® 11 has a unique, two-part back rest which reduces pressure on the spine by up to 50%. The back rests are independently mounted, moving and flexing with the user. This dynamic movement has positive effects on the back muscles, metabolism, blood circulation and nervous system.

Downloadable instructions


  • Streamlined design features a partially upholstered back.
  • Unique, patented back design supports the spine without direct contact.
  • Width-adjustable pads move in 3 dimensions and reduce pressure on the spinal column by up to 50%. 
  • These chairs are made to order and delivery may take up to 6 weeks.

See Also:


Please look at our comprehensive list of Chair Features & Benefits

Feature  Availability
Synchronous Mechanism Standard
Asynchronous Mechanism No
Free Float (Rocking) Feature Standard
Seat Tilt Adjustment Standard
Independent Back Angle Adjustment No
Seat Slide Standard
Adjustable Lumbar Support No
Pelvic Support No
Height Adjustable Arm Rests Option
Width Adjustable Arm Rests Option
Depth Adjustable Arm Rests Option
Independently Adjustable Head Rest Option
Independently Adjustable Neck Rest No
Suitable for Clean Room No
ESD (Anti Static) No
Suitable for 24 Hour Use No

Part Number: GL-DB11


Part Number GL-DB11
Type (Low, Medium, High Back, Spilt Seat/Back) Split Back
Weight (Packed) (kg) 24
Weight (Un-Packed) (kg) 19
Seat Height Adjustment (Y/N/O) Y
Back Height Adjustment (Y/N/O) Y


Maximum Weight Capacity 117kg - 18.5 Stone
A - Back Height (mm) 480-560
B - Lumbar Height (mm) NA
(B) - Pelvic Support (mm) NA
C - Chair Arm Height (mm) 130-235
D - Seat Depth (mm) 380-425
E - Seat Height (mm) 450-580
F - Seat Width (mm) 490

What our customers say

"Have tried a couple of other mice, looking for a vertical alignment. Some too big, or too small, or too heavy but this is so adaptable with changing angles and thumb position, I thought it would be a good one to try. Have had it a week, and having simply plugged it in (to my Mac), I have have found it really easy to use. I managed to adapt it to my needs with big hands, and need to lift and scroll (for CAD work) - so although the easing of the RSI situation will only be none in the long run (I'm not ready to stop work!), I am well satisfied."

Anonymous on the Contour Unimouse

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