The heavy-duty 5-shelf steel shelving unit with its patented design and attractive silver finish is the perfect storage solution for organizing bulky items in your basement, workshop, garage, business, or anywhere you need heavy-duty vertical storage. Muscle Rack 5-Shelf Steel Shelving Unit, Silver Vein. Boltless steel storage rack with 5 adjustable particle board shelves supports up to 4,000 pounds when evenly distributed across all shelves. Construct vertically as a single shelving unit or horizontally for a 2-piece workbench style unit for your basement, garage, workshop, or anywhere you need heavy-duty versatile storage. Shelves are adjustable in 1.5 increments to accommodate items of varying sizes. Heavy-gauge steel frame with powder coat silver vein finish for strength and durability. Post couplers allow easier post assembly and improved rigidity. Shelves are made of particle board. Shelves are supported by double-riveted beams and braces. Post connectors allow for easy assembly in just minutes. Rivet lock design for boltless assembly. 2-piece post design for vertical assembly of a single 72″ high unit, or for horizontal assembly of two 36″ high units. Assembled size: 36″W x 18″D x 72H. Assembled Product Dimensions (L x W x H). 36.00 x 18.00 x 72.00 Inches.