Tired of that cheap flimsy plastic cap that came with your Ram? Worried about dirt or moisture entering the fuel system? Contaminants in the fuel can wreak havoc on a diesel engine and cause costly repairs. Our gas cap has a circle ring that seals out dirt and moisture, keeping contaminants out. Made from aircraft grade aluminum and anodized green, this fuel cap performs well and looks good. And dont worry about loosing it, the magnetic base allows you to stick it onto the hinge of your fuel door when refueling. This is the fuel cap that should have been installed on the truck from the factory.