The Ultra Rack Shelving can be assembled in different configurations for storage convenience. These heavy duty steel frame units are designed and built to industrial standards and will fit all your storage needs. Shelves can be assembled either as a 18 in. depth by 36 in. width and 72 in. height, 5 shelf unit or as a 18 in. depth by 72 in. width and 36 in. height workbench. 4000 lbs total capacity. Z-beam construction for strength and rigidity. Rivet lock design assembles in minutes with just a hammer. Shelves adjust every 1-1/2 in. for maximum flexibility. Baked enamel finish in gray. Complete unit includes particleboard shelves.