Polyurethane ESD Medium Bench Height Chair in Chrome is adjustable from 20.25-28 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, electro-static dissipating components to ensure proper grounding, and cast-aluminum base with dual-wheel, self-braking, non-marring ESD casters suitable for hard floors in electro-static dissipating polyurethane.