The UWS Steel Combo Transfer Tanks feature a dual construction of steel and aluminum. The tank is constructed from 14-gauge steel, allowing for dependable transfer of liquids, and also comes with a built-in toolbox constructed from 0.08" aluminum. This combo design means this unit weighs up to 100 lbs less than competitive units, the company says. The combo tanks offer a smooth, mill finish that is available in two powder coat finish options: black or white. These tanks are also available in L-shaped or rectangle configurations. All tanks are made in the U.S.A. and are fully pressure-tested for safety. They come with a lockable commercial-grade built-in drain plug and internal baffles for smooth flow of liquids.