A fuel system for supplying LPG fuel, the system including a fuel storage tank and a fuel transfer tank. The immunogenic conjugate, when combined with a pharmaceutically acceptable carrier, forms a suitable vaccine for mammals to prevent infection by the Gram negative bacteria. The strap is secured between the doorframe and the roof of the vehicle and allows the impact absorbing structure to hang horizontally along the outside of the vehicle. The laser mounting region is connected to the lateral probing region by a bridge portion of the patterned metal layer. The alkyl ketene dimer sizing agent is present in an amount ranging from about 2.