Ideal for installations with multiple applications and height ranges. Adjusts 8" up or down pneumatically while seated and an additional 10" manually with Wave Tube Extension. Overall seat height adjusts 17" to 35". Oversized black polyurethane self-skinning foam seat and back. Large, tubular steel base ensures stability. Wide-angled textured footrest provides secure footing and ergonomically correct leg position. One footrest. Backrest adjusts 3" in height and depth. Seat: 16-1/4w x 16-1/4d. Back: 14-1/2w x 9h. Shpg. wt. 32 lbs. Assembly required.