Boss Office Products Drafting Stool with Footring: * Contoured back and seat help to relieve back-strain * Pneumatic gas lift seat height adjustment * Large 27" nylon base for greater stability * Hooded double wheel casters * Strong 20" diameter chrome footring * Optional glides can be used in place of casters (sold separately) * Tweed upholstery and nylon base construction * 6-year warranty * Dimensions: 25"L x 17.5"W x 49.5"H