Task chair features a smart, flexible design that automatically adjusts to your every move. Waterfall seat edge reduces pressure for improved circulation. Enjoy custom comfort with height-adjustable padded arms. Arms adjust in height from 8-7/8″ to 11-1/8″ from the fabric-covered seat. Distance between arms is 17-3/4″. Functions include pneumatic seat-height adjustment from 18″ to 21″, 360-degree swivel, tilt tension and tilt lock. Seat measures 20″ wide x 16-3/4″ deep. Fabric-covered back measures 20-1/4″ wide x 22-1/2″ high. Five-star base has five 2″ dual-wheel casters for easy chair movement. Weight capacity is 250 lb.