Blue polyurethane desk height chair with medium back is adjustable from 16.25 - 21.5 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, locking seat tilt, and black, nylon-reinforced fiberglass base with stationary, non-marring glides suitable for hard floors in chemical, soil, and puncture resistant polyurethane.