This mesh back drafting chair from Boss Office Products features a screen mesh backrest designed to help prevent body heat build-up while providing contoured support. Other features include thickly padded foam filled seat, breathable black mesh seat fabric, pneumatic seat height adjustment, 360 degree swivel, 20" diameter chrome footring, solid metal frame with black finish and a heavy duty 25" nylon base with double wheel carpet casters. Additional caster options available for this chair. Meets or exceeds ANSI/BIFMA standards. Optional adjustable or fixed arms available for a minimal charge. Dimensions: Seat Size: 19.5"W x 19.5"D. Seat Height Adjustment: 25.5" -29"H. Overall: 42 - 45.5"H x 27.5"W x 27"D. Weight: 33 lbs. Six year limited warranty from Boss. This chair normally ships within 2-3 business days from either our CA or GA warehouse.