Base price is for a shelving unit with 4 shelves, you can add more shelves, wheels, liners if available. 72" H x 36" W x 18" D Shelf Finish Black Epoxy: NSF certified - the black epoxy shelving units are perfect for most garages, offices, closets and warehouses. Each shelf has a weight capacity of up to 600 lbs. evenly distributed (note that due to the stress on the wheels/casters, weight capacity is reduced to 200 lbs per shelf if wheels/casters are attached). Please note that both the 72" poles and the 52" poles consist of a top and bottom piece connected by a threaded connector. Included screw-in leveling feet for height adjustments and stabilization of the unit. Optional: Shelf liners (mats) are use if you want to place smaller objects (i.e. Tools, nuts, bolts, etc.) so that the objects cannot slide through the cracks.