The Pacbrake C11940 1/2 Gallon AMP Air Tank Is a useful accessory to have when you need a compressed air tank on your vehicle. Air tanks allow you to have stored air ready to operate one or more components with little to no wait time. Pacbrake tanks come powder coated black and have anti-rust inhibitor applied internally for extra corrosion protection. This tanks is made from steel and has mounting brackets welded on for easy mounting and installation.