We designed Power Spout as a 5 gallon pour spout specifically for VP Racing Fuels 5 gallon pails. It screws directly onto the pull-out spout. Best of all, it makes the transfer of liquids simple and easy. The Power Spout's vent tube allows air to flow into the bottom of the container, which releases the internal pressure. As a result, pouring is both quick and smooth. NOTE: VP Power Spout ONLY fits VP Racing Fuels 5 Gallon Pails, not 5 Gallon Motorsport or Sportsman Containers. VP has a number of fuel handling devices available to fit your needs.