Boss Black Fabric Drafting Stools with Footring; Fabric Crepe; Weight Capacity 250; Optional glides can be used in place of casters (TU021).; Seat Size 19.5" W x 18" D; Seat Height 26.5" -31.5" H; Contoured back and seat help to relieve back-strain.; Finish Black; Pneumatic gas lift seat height adjustment.; Available in four fabric colors and black Caressoft.; Large 27" nylon base for greater stability. Hooded double wheel casters. Strong 20" diameter chrome foot.