Lorell Multi-Task Chair, Adjustable, 24"x24"x33"-38", Burgundy Pneumatic Multi-Task Chair offers a synchronized mechanism that allows seat and back to adjust at the same time and can be locked in any position. Other features include pneumatic seat-height adjustment, back height adjustment, seat depth, 360-degree swivel and multi-task control. Molded seat and back allow comfort for all-day use. Arm height and width arms can be adjusted. Durable shellback and seat allow for clean smooth lines. Adjustable back provides support where you need it. Abrasion rating is 30,000 cycles. Seat-to-floor dimensions are 17-3/10" to 22-2/5".