Sandusky/Edsal UR185P-BLK Black Steel Heavy Duty 5-Shelf Shelving Unit, 4000lbs Capacity, 36" Width x 72" Height x 18" Depth (Does not include post couplers) Standing five-shelf unit with a 16-gauge steel rack and shelves made of particle board to support an 800-lb. per shelf capacity and a 4000-lb. total capacity. Item does not come with post couplers. Double-riveted beams lock into double-rivet holes on corner post for structural security Corner post rivet holes are punched at 1-1/2" intervals for precise adjustment to shelf height Two-piece post design for vertical assembly of a single 72" high unit, or for horizontal assembly of two 36" high units Rivet lock design for boltless assembly, instructions included, rubber mallet recommended for assembly (sold separately)