Tennsco Snap-Together Steel Six-Shelf Closed Starter Set, 48W X 12D X 76H, Sand Sold as 1 EA. Provides a single freestanding unit. Use with Add-On Units for a complete wall system. Units snap together without tools or fasteners. All shelves are adjustable. Order one Starter Set and any number of matching height Add-On Units. Two "L" uprights for the frame.