This Multi-Function Budget Drafting Stool is upholstered in Black LeatherPlus (leather and polyurethane) for added softness and durability It has a pneumatic gas lift seat height adjustment, allowing for versatile adjustment of the seat height to suit your comfort and work environment It is attached with a 20-inch diameter chrome footring for added leg and foot support The large 27-inch black nylon base provides added stability to the chair The hooded double wheel casters make it easy to move and shift directions