Grahl Duo Back® Type 11 Office Chair
Grahl duo back, the secret of optimal balance between seating and moving, is the office chair that offers long-time outstanding comfort. Duo Back® is the office chair which offers you extraordinary lasting seated comfort due to the flexible dual backrest whose parts move individually of each other. Duo Back® backrest has been proven to provide up to 50% less pressure on the spinal column.
Due to the split back rest that moves flexibly in all directions, this principle has set ergonomic standards for years.
Flexible dual split backrest provide optimal support
Due to flexible backrest connectors and synchron tilt mechanism this chair optimally supports individual movements. You are seated excellently and your body is perfectly supported.
The dual backrests that make the Duo Back® so unique, conform optimally to the shape of thorax. The dual backrests not only support in the forward and backward motion but also in the side-to-side movement.
Padded adjustable elbow rests
The padded elbow rests, are so cleverly designed that they can be adjusted to fit any body size. The padded support area makes it possible to sit on this chair and work without putting pressure on the elbows.
Sliding seat adjustment
Seat can be adjusted forward and backward for effective user personalisation.
Weight tension adjustment
The weight tension can be adjusted to meet the needs of different user weights. This ensures optimal support.
Independently width adjustable Duo Back® backrest pads
The backrest pads can be adjusted so the back is supported appropriately.
Height adjsutable armrests
Adjustment ensures the elbows are at the correct height relative to the shoulders.
Forward Tilt mechanism
Allows you to tilt forward up to 11 degree, re-positioning the pelvis to obtain optimal seating position.
- Seat height:
- 450-580 mm
- Seat width:
- 490 mm
- Seat depth:
- 400-450 mm
- Back height:
- 480-560 mm
- Back width:
- 400-450 mm
- Seat - lumbar:
- 210-290 mm
- Seat - elbow:
- 140-240 mm*
- Elbow - elbow:
- 360-620 mm*
- 5 years
* With A13 armrests
Q: My gas stem seems a little stiff – is this normal?
Sometimes, over time, the gas stem can become a little stiff when trying to adjust the height. A quick and easy fix for this is using WD-40 or Vaseline. Apply a light layer of grease to the gas stem, then try adjusting the gas stem 3-4 times. The gas stem should now adjust easily.
Q: Can my seat slide forward?
On the right side of the seat there is a small button. While seated, press this adjusting button and lean against the backrest. Then move the seat forward against the gas-spring pressure and release the button when the seat reaches the desired position.
Q: How do I stop the rocking motion of my Grahl Duo Back® Type 11 chair?
On the left side, under the seat, is a handle that you can press upwards while seated. This activates the tilt mechanism. The backrest tension can be infinitely adjusted to your bodyweight via the crank on the right.
Q: We have hot-desking and I want to adjust the backrest height – how do I do this?
To adjust the backrest height on your Grahl Duo Back®, release the lower hand wheel on the back bar, while you are behind the Grahl Duo Back®. Adjust the desired height and fix the position by tightening the hand wheel. To adjust the width of the backrest connectors, turn the top hand wheel. Fix the desired width by turning this hand wheel to the left or to the right.
Q: How do I adjust my armrests?
The height of the armrests can be adjusted by the buttons on the outer side of the armrest upright. The width is adjustable by the eccentric lever beneath the seat. The armrest pads are depth adjustable without pressing a button.
You can achieve additional adjustment of the width by rotating the armrest pads for particularly wide or narrow distance between the armrest pads. Press the button on the inner side while you turn the armrest pads.
Still having problems?
Please give our customer services team a call on +44 (0) 345 345 0010.
The estimated lead time for this item is displayed towards the top of the page, under the short description.
Delivery and installation options
We will deliver the item(s) using a standard courier service. You are responsible for the assembly and set up. We will provide assembly and set up videos and instructions to guide you through the process. See our delivery charges ›
Delivery, installation, set up and support
Our delivery partners will have you comfortably set up and familiarised with your products at the time of delivery. They’ll also take away and recycle the packaging. This option can be selected in the shopping basket page. Find out more about our delivery and installation service ›
Removal and recycling (chairs and desks only)
The recycling service can be added onto the delivery, installation, set up and support option at an additional cost. Choose this option if you would like your old chair or desk taken away when your new one is delivered. This option can be selected in the shopping basket page. Find out more about product removal and recycling ›
We offer a 30 day return policy on this item, providing the item is not damaged and standard options have been ordered. You must first phone the office to obtain a Returns Note and Number. The goods must be returned during business hours, carriage paid, in perfect condition in their original packaging, with the Returns Note enclosed.
For more detailed information on our returns policy and any right you have to return goods under the Consumer Contracts Regulations 2013, please visit our 'Returns and refunds' page, accessed from the footer.
Please note, non-standard options such as a coccyx cut-out or memory foam seat are non-returnable. For more information, contact us on +44 (0) 345 345 0010.
Contact us about your seating project
Need more than one chair? However big or small your project is, we have a dedicated service to support you. Not only will you get expert advice, trials, delivery and set-up, but you’ll also benefit from great discounts on bulk orders.
To request a no-obligation quote, or to discuss your requirements further, please fill out our contact form and we will get back to you as soon as possible.