ALVIN Utility Stool (Urethane) - An extremely rugged and stable polyurethane utility stool on a traditional American-style base, this model has a durable seat and backrest built to withstand heavy use in rigorous work environments. Ideal for extended sitting periods. Will resist punctures, water, and most chemicals. Features include pneumatic height control, a height- and depth-adjustable hinged backrest, and a 23 inch diameter black powder-coated tubular steel base with built-in foot ring. Seat is 17w x 16d x 2 inches thick. Backrest is 15w x 12h (inches). Height adjusts from 21 to 28 inches. Comes complete with a set of locking casters and a set of non-slip floor glides. Easy clean, maintenance free. 35 lbs. Black.