This RDS Aluminum Fuel Tank/Transfer Tank/Toolbox Combo is designed for transferring diesel fuel, gasoline or aviation fuel from the bed of a pickup to automobiles, heavy equipment, boats, 4- wheelers, generators, or anything else requiring fuel. Enjoy the convenience of a gas station that goes where you go. DOT approved aluminum fuel tanks do not rust, which protects fuel from contamination. The tank can also be used as an auxiliary unit to provide additional capacity for a diesel factory tank with the use of an RDS diesel install kit (Item#s 3490901, 3490902 and 43748, sold separately). Diesel install kits will work with any RDS tank with a drain fitting. Auxiliary tank function is for use with diesel fuel only and is not for use with gasoline, which cannot be gravity-fed. It is the user’s responsibility to comply with local, state and federal requirements pertaining to safe transportation, loading and discharging of tank contents.