Class 10 Clean Room Core Industrial Black Polyurethane Desk Height Chair in Chrome is adjustable from 16.5-21.75 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 cast-aluminum base with chrome-hooded, dual-wheel, self-braking, non-marring casters suitable for hard floors in chemical, soil, and puncture resistant polyurethane.