2013-2017 Dodge Ram Diesel Billet Aluminum Fuel Cap Magnetic This fuel cap works on all 2013-2017 Dodge Ram diesel trucks with a 'capless' fuel system CNC Machined from lightweight 6061-T6 aluminum and then anodized diesel green for a clean look 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 The word "DIESEL" has been laser etched on the top of the cap Buna-N Nitrile O-ring keeps out dust, moisture, rain, snow, dirt, and ultimately keeps contaminants out of your fuel system