The titan travel trekker is a sleek, in-bed auxiliary fuel tank system that fits under most bed covers. It pumps diesel fuel into the trucks main tank via an electric fuel pump which is controlled in the cab via a push button controller that also serves as a fuel level gauge. The tank is made of military grade cross-linked polymer which does not rust or corrode. The polymer is also much stronger than traditional in-bed metal tanks which crack, break and split open. The tank is very easy to install. Go further, go titan .