A rugged drafting-height chair with a polyurethane seat and backrest that is built to withstand heavy use in labs and other work environments. Will resist punctures, water, and most chemicals. Comes complete with a height-adjustable, 18" diameter, chrome foot ring. Features include pneumatic height control with an adjustment range from 23" to 33", a height- and depth-adjustable hinged backrest, and a 25" diameter reinforced nylon base. Seat is 18"w x 18"d x 1½" thick. Backrest is 17"w x 12"h x 1" thick. Includes a set of non-locking casters and a set of floor glides. Black.