Core Industrial Gray Polyurethane Medium Bench Height Chair is adjustable from 18.75-26.25 inches from the top of the seat to the floor and features manual back height and back depth adjustments, built in handle for ease of movement, 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.