With an overall height of 17" to 35", the ergonomically designed Industrial Series provides 8" (200mm) of pneumatic lift and an additional 10" with our Wave Tube Extension. 360° swivel. Seat has a 2-1/2" deep cushion. Features include a paddle lever control that provides 22° backrest tilt and ergo knob for 5" backrest height adjustment. Sturdy 5-leg, 26" dia. tubular steel base with 2-1/2" high-impact nylon glides for safety and stability. Ergonomically correct high and low-rung polypropylene footrests mount securely to base. Meets or exceeds ANSI/BIFMA standards. Covered with black microcellular, self-skinning polyurethane foam for comfort. Assembly required. 15 Year Warranty.