Class 100 Vinyl Medium Bench Height Clean Room/ESD Chair with Medium Back in Chrome is adjustable from 21.5-29 inches from the top of the seat to the floor and features ergonomic adjustments including seat height and locking back tilt, electro-static dissipating materials for proper grounding, locking seat tilt, and cast-aluminum base with dual-wheel, self-braking, non-marring, ESD casters suitable for hard floors in ESD Vinyl.