Managerial mid-back chair features a breathable mesh back chair & fabric-upholstered seat. Mesh upholstery is made of high-strength elastic nylon. Ergonomically designed mid-back matches the natural curvature of a person's back. Arms adjust in height (25" to 28-7/10") & in width (24" to 26"). Functions include pneumatic seat-height adjustment (17-7/10" to 21" high from the floor), 360-degree swivel & swivel tilt mechanism. Black frame has five-star, reinforced nylon base (25" 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.