The Industrial Air 20 Gallon ASME portable auxiliary air tank is a 2-in-1 multi-function air tank. The air tank works as a horizontal or vertical auxiliary storage tank with a compressor or as a portable air carry tank. There are 2 air access assemblies, one that uses an air hose from your air compressor to connect the air line shut off valve and easily fill the tank and 1 to use an air hose to connect to the quick connect coupler end. This air tank is equipped with 2 welded on carry handles for portability and has a convenient ring base for vertical storage.