Muscle Rack UR4818HPSVL6 Boltless Storage Rack with 6 Shelves, 3000 lb Capacity, 48" Width x 84" Height x 18" Depth, Silvervein Heavy-duty Z-beam construction for strength and rigidity Smooth post design conceals assembly Assembles in minutes, no nuts and bolts required Laminate shelves resist moisture and are easy to clean Can be assembled vertically or horizontally as a workbench