The Side Mount Steel Reservoir from Buyers Products is built of tough 13 Ga steel and is designed to install on the side of your truck. The reservoir is fully baffled to control fluid movement and keep things cool. It features a black powder-coated finish for enhanced corrosion resistance. The tank has a 2 in. NPT return port/drain on its bottom. Each unit includes a sight level and temperature gauge and a quarter turn filler breather unit. Mounting brackets are sold separately (see "Accessories" below). Please Note: Mounting Kit #SMS005BK is required to mount tank or warranty is void.