Black Polyurethane Ray Sit-Stand Medium Bench Height Stool in Chrome is adjustable from 20-28 inches from the top of the seat to the floor and features ergonomic adjustments such as seat height and locking seat tilt 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.