The Alvin Prestige Artist/Drafting Chair (Black) is for the serious artist or designer that are both comfortable and sturdy. Features include pneumatic height control, polypropylene seat and back shells, a height- and depth-adjustable backrest with tilt-angle control, articulating seat and backrest, dual-wheel casters and a 26" diameter reinforced nylon base. Height adjustable foot ring comes standard. Seat cushion is 19" w x 18" d x 3" thick. Backrest is 17" w x 15" h x 3" thick. Height adjusts from 24" to 34".