Provides a single freestanding unit or 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. Includes adjustable 12" deep shelves, shelf supports and five file dividers per shelf. 200- to 300-lb. load capacity per shelf with weight evenly distributed. Heavy-duty rolled steel construction with sand finish.