Class 10 Clean Room Black Polyurethane High Bench Height Stool in Chrome is adjustable from 23.5-33.25 inches from the top of the seat to the floor and features 360-degree, all-around control, chrome adjustable foot ring, and cast-aluminum base with chrome-hooded, dual-wheel, self-braking, non-marring casters suitable for hard floors in chemical, soil, and puncture resistant polyurethane.