Rutledge Vinyl Medium Bench Height Chair with Medium Back is adjustable from 21-28.25 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt and black, nylon-reinforced fiberglass base with dual-wheel, self-braking, non-marring casters suitable for hard floors in antibacterial/antifungal Borscht Supernova Vinyl.