The Flash Furniture Mesh Designer Drafting Chair has a perforated plastic back and a padded foam swivel seat upholstered in black fabric. The angle of the back rest locks for comfortable leaning and sitting. The back rest measures 18 inches wide and 21 inches high, while the seat is 19 inches long and 18 inches wide. Seat height is adjustable from 25½ to 29¾ inches. This drafting chair has a heavy duty nylon base with an adjustable chrome foot ring and dual wheel casters. Assembly is required.