DEF Green Billet Aluminum Magnetic Fuel Cap for Diesel 2013-2016 Dodge Ram *Compatibility*-This fuel cap works on all 2013-2017 Dodge Ram diesel trucks with a 'capless' fuel system with 3.0L V6 engine. *High quality material*-CNC Machined from lightweight 6061-T6 aluminum and then anodized diesel green for a clean look. *Great sealing*-Buna-N Nitrile O-ring for long life and chemical resistance,keep dirt from entering your fuel system. *Hard to lost*-Neodymium magnet in bottom of fuel cap. When refueling simply place the fuel cap against the steel fuel door and the magnet will conveniently hold it. *Easy to install*-Simply remove your old cap and reattach your new fuel cap in its place.