Cheerwing Mid-back Mesh Task Chair Home Office Computer Desk Tilt Chair Study Swivel Chair with Arms, Purple SIZE23.2x22.8"x36.2"-40.9" Heavy Duty Nylon Base with Dual Wheel Carpet Casters Ergonomically designed for comfort for those who work at desks for long periods. 360 Degree Swivel and Tilting Function Pneumatic seat office chair: height adjustment for easy positioning ,one touch pneumatic seat height adjustment chair