One of our most ergonomic drafting chairs - built for maximum comfort! Features of this chair include built-in lumbar support, adjustable back height, backrest also tilts by itself or in unison with the seat, pneumatic seat height adjustment, Teflon coated, stain resistant commercial grade fabric available in (5) different colors, height adjustable urethane T-shape arm rests, black powder coated adjustable height footring, includes two cylinder extensions that allow you to adjust the seat height from either 26"-30"H or 29"-33"H and a heavy duty nylon base with dual wheel carpet casters. This chair meets or exceeds ANSI/BIFMA standards. Dimensions: Seat size: 21"W x 21"D. Back size: 21"W x 24.5"H. Limited lifetime warranty from OFM. This OFM ergonomic drafting chair normally ships within 1-2 business days from our NC or AZ warehouse.