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.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.