Gray Polyurethane Medium Bench Height Chair with Medium Back is adjustable from 19.25-26.75 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, 6-way adjustable arm rests, and black, nylon-reinforced fiberglass base with dual-wheel, self-braking, non-marring casters suitable for hard floors in chemical, soil, and puncture resistant polyurethane.