This medical stool is upholstered in durable Black, antimicrobial vinyl, and equipped with a 4-inch thick molded foam seat that provides improved durability It is attached with an easy to reach gas lift seat height adjustment lever, providing a vertical range of 6-inch to suit your personal comfort and work environment Its base has an attractive chrome finish, and provides great stability to the stool The hooded double wheel casters make it easy to move and shift directions