Heavy duty and static free, high-density polypropylene material with a light grain texture surface on both sides, injection molded into a one-piece shell with waterfall edge. Molded in a Ribless back design for comfort and flexibility. The ergonomically designed opening in the shell back provides added comfort as well as a handle grip. The shell is attached to the frame with steel rivets underneath the seat, which offers no exposed hardware on the surface. Legs are formed of 1-1/8"' 14-gauge tubular steel. The legs are welded to two 14-gauge steel brackets with a continuous weld at all four connection areas. Brackets run front to back on the chair. No additional bracing is needed between the legs for support. The frame is bright nickel chrome, plated after welding. Powder coat paint is also offered. Glides are silent, rubber cushioned, swivel of self-leveling, 1" diameter, hard carbon steel, nylon based type with a flat bottom, chrome plated. Available Sizes: 12”, 14”, 16”, & 18" XL Available Options: Bookrack, Casters, Padded Seat, Band Pitch, Steel Glides, Felt-Tip Glides, Qball Glides, Boot Glides