This heavy duty drafting stool from Office Star features a breathable double Air Grid screen mesh backrest for maximum support and ventilation. Other features include built-in lumbar support, thick foam padded seat cushion, black mesh fabric seat upholstery, pneumatic seat height adjustment, 360 degree swivel, height adjustable gunmetal finish footrest and a heavy duty base with dual wheel carpet casters. Optional height adjustable armrests also available. Rated for users up to 325 lbs. This heavy duty drafting stool meets or exceeds ANSI/BIFMA standards. Dimensions: Seat Size: 21.5"W x 20"D. Back Size: 20.5"W x 22.5"H. Seat Height Adjustment: 28" - 33"H. Weight: 51 lbs. Overall: 54.5"H x 21.5"W x 25.5"D. Limited lifetime warranty from Office Star. This heavy duty drafting chair normally ships within 2-3 business days from our CA warehouse.