Advanced active ergonomics goes from sitting to standing with ease. Pivoting angled column moves with the body for constant alignment. Perch or lean when you wish to perform fast tasks or fully sit down when you wish to concentrate on more complicated tasks. Goes from sitting height to standing height. Perfect for use with height adjustable workstations. Auto return swivel seat moves with the body as you twist, and returns to front automatically when you get up. Dual integrated height adjustment levers for quick adjustments with either hand. Wide boomerang base for stability when leaning far forward. Recommended Applications: General Office & Task; Conference, Training & Meeting; Arms Included: No; Pneumatic Seat Height Adjustment: Yes; Overall Width Maximum: 21 7/8″. UPC: 042167393366 UPC: 042167393366. No returns.