Transfer Flow 40 Gallon In-Bed Under Tool Box Auxiliary Diesel Fuel Tank System Model 0800117470Transfer Flow 40 Gallon In Bed Under Tool Box Auxiliary Diesel Fuel Tank System Model 0800117470 Combining a 40 gallon in bed auxiliary fuel tank with a ProTech Tool Box provides the ultimate truck bed solution. Its sleek, low profile design fits under most over the rail toolboxes, including ProTech models, and tucks neatly beneath tonneau covers for a clean, integrated look. Constructed from high yield 12 gauge U. S. aluminized steel with a durable