This ergonomic mesh back drafting chair from Office Star features an Air Grid screen mesh backrest for maximum airflow and support. Other features include a thickly padded seat cushion with black mesh fabric upholstery, ergonomic dual function control that adjusts back angle relative to seat and forward tilt, pneumatic seat height adjustment, 360 degree swivel, adjustable height foot ring and a heavy duty five star nylon base with dual wheel hooded casters. This drafting chair meets or exceeds ANSI/BIFMA standards. Optional adjustable arms available for a minimal charge. Dimensions: Seat Size: 20"W x 19.75"D x 3.5"Thick. Back Size: 19.75"W x 17.75"H. Seat Height: 19.75" - 27.25"H. Overall: 44.5"H x 20"W x 26"D. Limited lifetime warranty from Office Star. This chair normally ships within 2-3 business days from our CA warehouse.