STURDY AND STRONG: The Economy Workbench Chair offers you a balanced and comfortable seat, perfect for you office environment ADJUSTABLE CHAIR: The Polyurethane foam seat with pneumatic seat height adjustment 22" to 32"H, adjusts the chair to your ideal height level. The chair offers 360 swivel to give you full mobility and range of motion while working in the office. ADJUSTABLE BACK: The polyurethane foam back with height adjustments gives you the option to find the perfect fit for your back and kneck. After you use the tilt adjustment, use the tilt lock feature to firmly lock the foam back in place. STABILITY and MOBILITY: Keep your body balanced and relaxed as you move around your office space with the five star base and with durable nylon glides and footrest ring. OPTIONAL T-PAD ADJUSTABLE ARM SET: Safco Products optional T-Pad adjustable arm set Model 6683, 2" carpet casters Model 5131 and hard floor casters Model 5132, sold separately