Magnetic Diesel Fuel Cap Accessory for Dodge RAM TRUCK 1500 2500 3500 (2013-2018) with 6.7 CUMMINS EcoDiesel, Lightweight Design, Includes 2 O-Rings PROTECTION - This RAM diesel fuel cap stops dirt, water and other debris out of your fuel tank saving you costly engine repairs TIME TESTED - This original ecodiesel fuel cap design will last forever with the green anodized finish PERFECT FIT - Includes 2 Sizes of O-Rings so you can pick the size that fits best for your truck, better than the red plastic cap MAGNETIC - Strong permanent neodymium magnet holds the cap to the truck while you fill up LIFETIME WARRANTY - If you ever have a problem we will replace the cap with no hassle, order with confidence like many others