This backless work stool from OFM features durable anti-bacterial, anti-microbial vinyl upholstery available in your choice of 4) different colors. Other features include one touch pneumatic seat height adjustment, 3" thick foam padded seat cushion and a heavy duty five star nylon base with dual wheel casters standard. Other caster options available for a minimal charge. Meets or exceeds ANSI/BIFMA standards. Dimensions: Seat size: 14"Round. This stool also ships with an additional cylinder extension that allows you to adjust the seat height from either 23"-27"H or 27"-31"H. Limited lifetime warranty from OFM. These vinyl upholstered work stools normally ship within 1-2 business days from our NC warehouse.