Task chair offers an air grid seat and back with built-in padded, lumbar support. Mesh screen back provides increased breathability. Functions include one-touch pneumatic seat-height adjustment, 360-degree swivel, and 2-to-1 synchro tilt control with adjustable tilt, tilt lock and tilt tension. Angled arms with soft pads are height adjustable. Heavy-duty angled nylon base has oversized dual-wheel carpet casters. Seat size is 20-1/2" wide x 21" deep x 3-1/2" thick. Back size is 20-1/2" wide x 19" high. Distance between arms is 18-3/4".