Vinyl Medium Bench Height Stool with Back is adjustable from 20.75-28.75 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 Marine Blue Supernova Vinyl.