The Edsel HDL183672 five-shelf standing shelf unit is made of steel to support a 240-lb. per shelf capacity and to support a 1200-lb. total capacity when the weight is distributed evenly across all shelves. The corner post holes on this unit are punched at 1-1/2" intervals for precise adjustment to desired shelf height. This shelf unit has a gray enamel finish for corrosion resistance. This unit has cross-braces on the back, and braces on both sides and the front for rigidity.The assembled unit is 72 x 36 x 18 inches (H x W x D). (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.) This unit has a nut and bolt assembly. Assembly instructions, nuts, and bolts are included. Tools for assembly are sold separately.Standing shelf units are commonly used to store items to help create organized, efficient, and safer work areas. These systems typically consist of a frame or rack with open shelves. Added components such as casters, wheels, or handles are used for applications that require mobility. Standing shelf units are used in a variety of office, industrial, educational, and residential settings.Edsal Manufacturing Company manufactures storage systems and industrial furniture. The company, founded in 1952, is headquartered in Chicago, IL.