The Alera Industrial 4 Shelf Heavy-Duty Wire Shelving Starter Kit - 48W x 24D x 72H in. makes a perfect way to keep your heavy-duty supplies, tools, and other assorted items securely stored. Rugged steel supports the frame, outfitted with wire shelves. Adjust the shelves in height to suit your specific designs. The shelving unit can be built as either a single four-tier unit or a pair of two-tier shelves as desired. Choose color option from the available. Ideal for garages, sheds, or around the house.