Managerial mid-back chair features a breathable mesh back chair, fabric seat and ratchet back to enhance your comfort. Mesh is made of high-strength elastic nylon. Ergonomically designed mid-back matches the natural curvature of a person's back. Seat and back angle can be adjusted and locked independently. Arms adjust in height (25-3/5" to 29") and in width (24" to 26"). Functions include pneumatic seat-height adjustment (18" to 21-2/3" high from the floor), 360-degree swivel, seat slider for seat depth adjustment, tilt and asynchronous three-lever control. Black frame has five-star, reinforced nylon base (26" diameter) with casters for easy mobility. Seat size is 20" wide x 18-7/10" depth. Back measures 20" wide (at the widest portion) x 19-7/10" high. Weight capacity is 250 lb. Chair meets the CA117 fire-retardant standard and BIFMA standards.