Industrial Gray Polyurethane Desk Height Stool with Round Tube Base is adjustable from 18-23 inches from the top of the seat to the floor and features 360-degree, all-around control mechanism making it easy to adjust no matter where you sit and black, powder-coated steel base with fixed foot ring with dual-wheel, self-braking, non-marring casters suitable for hard floors in chemical, soil, and puncture resistant polyurethane.