Transfer Flow's 40-Gallon Fuel Tank & Tool Box Combo is designed for full-size short-bed and long-bed Ford, GM, and Ram diesel pickups. The fuel tank and toolbox offers increased fuel capacity and 6 cu.-ft. of storage space and a secure fuel filler neck within a locking storage compartment for safekeeping. The device is constructed with 14-gauge aluminized steel and features a black powder-coated finish for durability. The auxiliary tank is equipped with the TRAX 4 operating system for automated fuel transfer to the OEM fuel tank based on preset levels, which can be monitored through the TRAX 4 app.