This drafting chair from OFM features a height & pitch adjustable backrest, built-in lumbar support, pneumatic seat height adjustment, teflon-coated stain-resistant commercial grade fabric and a five star base with dual wheel casters. Optional height adjustable arms available for a minimal charge. This chair meets or exceeds ANSI/BIFMA standards. Dimensions: Seat size: 19.75"W x 19.75"D. Back size: 17.25"W x 19"H. Seat Height: 28.5" - 32.5"H or 31.5" - 35.5"H. Weight: 36 lbs. Limited lifetime warranty from OFM. These OFM chairs normally ship within 1-2 business days from our NC or AZ warehouse.