Transfer Flow now offers a 40-gallon all-in-one toolbox and refueling tank combo along with its 30- and 50-gallon combos. This hybrid fuel tank/toolbox storage system fits most trucks to give you secondary fuel storage space and tool storage space on top. It includes a 12-volt refueling pump, 12-foot hose with nozzle, dash-mounted power switch, and mounting hardware, and is DOT approved for gas, diesel, ethanol, and methanol.