This mesh back drafting chair from Office Star features a breathable screen mesh backrest with built in lumbar for maximum support and ventilation. Other features include height adjustable backrest, seat depth adjustment, thickly padded foam filled seat cushion, seat upholstered in black mesh fabric, adjustable height foot ring with chrome finish, 360-degree swivel, pneumatic seat height adjustment and a heavy duty five star nylon base with dual wheel carpet casters. Additional caster options also available for this model. This mesh drafting chair meets or exceeds ANSI/BIFMA standards. Dimensions: Seat Size: 19"W x 18.25"D x 3"Thick. Back Size: 18"W x 16.75"H. Seat Height Adjustment: 24.25" - 33.75"H. Overall: 50.25"H x 26"W x 23"D. 15 Year limited warranty from Office Star. This drafting chair normally ships within 2-3 business days from our CA warehouse.