Commercial-Grade Mesh Back Stool features an attractive, linear mesh back to help prevent heat buildup. Back construction delivers generous lumbar support. Thick, high-density foam seat is upholstered with premium mesh material for quality and style. Height adjusts using pneumatic gas lift. Stool includes 25" nylon base; hooded, double-wheel casters and a chrome footring. It is tested to hold up to 275 lb. and comes equipped with standard, fixed T-arms. This workhorse is perfect for your home, school or office.