Vinyl Desk Height Stool is adjustable from 17.25-22.5 inches from the top of the seat to the floor and features ergonomic adjustments, including 360-degree, all-around control and black, nylon-reinforced fiberglass base with dual-wheel, self-braking, non-marring casters suitable for hard floors in antibacterial/antifungal Colonial Blue Trailblazer Vinyl.