The Transfer Flow 70-Gallon Toolbox and Fuel Tank Combo is designed for 1999 to 2016 Ford, Ram and GM full-size diesel trucks. It sits on the bedrails, and has an adjustable storage box that adjusts to the depth of a short bed or long bed pickup for a custom fit. The storage area ranges from 5-1/2 to 9 cu. ft. The toolbox tank is made from 14-gauge aluminized steel for strength and rust resistance. It’s baffled in two places on all four sides to reduce fuel slosh, and is powdercoated black for a durable finish. An aluminum diamond plate lid comes standard with the option of having it powdercoated black. The fuel fillneck is located inside the locking storage compartment – keeping fuel secure.