Class 10 Clean Room Vinyl Medium Bench Height Chair with Medium Back in Chrome is adjustable from 21.5-29 inches from the top of the seat to the floor and features manual back height and depth adjustments, chrome adjustable foot ring, and cast-aluminum base with chrome-hooded, dual-wheel, self-braking, non-marring casters suitable for hard floors in antibacterial/antifungal Taupe Supernova vinyl.