Hands-Free Stool * Foot activated height control * Contemporary styling * 5-leg cast aluminum base * Firm polyfoam padding * Soft roll dual wheel hooded casters * Pneumatic cylinder height adjustment * Premium stain-resistant woven knit-backed vinyl upholstery * 24 black powder coated aluminum base * 4 thick round seat * 250 lbs. load capacity under normal use * 5 year limited warranty * Seat diameter 16 * Base diameter 24 * Height Range 19.5 - 24.5