24 hour ergonomic operator chair Tested & certified by FIRA BS5459 2000 Part 2 High back operator chair with inflatable lumbar support by means of an airbag in the backrest The lumbar airbag is easily inflated by using the hand pump To adjust the chair to your body shape simply sit in the chair use the deflate screw As it deflates, the bag contours to the back promoting good posture & a comfortable supported seating position Generous padded & upholstered seat & backrest Waterfall front seat helps to alleviate pressure on the thighs Gas height seat adjustment tested to 24 stone Black Nylon five star base with castors Available in two medium hazard fabric colours All blue or all charcoal Shown in mixed colours for illustration purposes only Minimal assembly required 2 year manufacturers guarantee Wide range of fabric colours can be made to order especially for you but cannot be cancelled once ordered. Fabric swatches are available on request.