Class 100 Vinyl Medium Bench Height Clean Room Chair with Medium Back in Chrome is adjustable from 21.5-29 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, locking seat tilt, 6-way adjustable arm rests, and cast-aluminum base with chrome-hooded, dual-wheel, self-braking, non-marring casters suitable for hard floors in antibacterial/antifungal Vinyl.