Class 10 Clean Room Blue Polyurethane High Bench Height Chair with Medium Back in Chrome is adjustable from 24.5-34.75 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, 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.