Warranted for continuous 24-hour use. Multifunction mechanism allows back angle adjustment relative to seat, adjustable tilt (free floating or infinite locking positions) and forward tilt. Waterfall seat edge reduces pressure at the back of knees. Padded slant T-arms are height- and width-adjustable. Impact-resistant molded plastic shell. Five-star base with casters for easy mobility. Recommended Applications: General Office & Task; Seat/Back Color: Black; Features & Functions: Back Height Adjustment; Pneumatic Seat Height Adjustment; Tilt Tension/Tilt Lock; Posture Lock; Asynchronous Control.