OK what is it? The fuel selector valve that so many of us have been using is no longer being made. Jim went looking for a replacment. This is what he found. It had so many ports we decided to look at the instructions. This is a dual valve---it not only delivers fuel from which ever tank is selected it also returns fuel to the same tank. You boys and girls with fuel injection can return fuel to the same tank if you put on another barb. This thing even switches the fuel gauge to the right tank if you want it to. Jim found a new toy today. LOL