WHITE STEEL DIESEL AUXILIARY TANK 100 GAL L-SHAPED 60" GM 99-10. Dee Zee Auxiliary Tanks - A safe and convenient means for transporting non-flammable liquids. Auxiliary tank can be connected to our gravity flow kit to syphon fuel directly into your vehicle's diesel gas tank. Constructed of heavy gauge steel. White powder coat finish. Radius curve design eliminates key weld pressure points. Tanks feature stability baffles, lockable cap, 3/8" drainage plug, and venting coupler. Tanks are intended for private use (non-commercial). Not designed for use as an auxiliary fuel system. Hydrostatically pressure tested to meet Federal Motor Carrier Safety Administration requirements for auxiliary tanks. Meets Federal DOT requirements for UN31B tanks.