Executive high-back chair features a mesh seat & ergonomically designed high mesh back for the natural curvature of a person's back. Arms adjust in height & width. Seat height from floor adjusts from 17" to 21". High-back chair offers a nylon five-star base, pneumatic seat-height adjustment, 360-degree swivel, tilt & asynchronous three-lever control. Steel frame is plastic-coated. Weight capacity is 250 lb. High-back chair is available in black frame only & meets the CA117 fire-retardant standard.