Features: Fuel cap keeps dirt water out of your fuel for tank. Use anodized aluminum to keep the engine running smoothly. Easy to install, direct replacement, no need to drill or cut. CNC billet aluminum, airtight locking system nitrile rubber O-ring, easy to rotate. The cap features a smooth and easy to grip handle that will slide and lock into place with a smooth-as-butter feel! Machined from aluminum to help ensure no fueling mix-ups. Create a simple and elegant shape for your car. This gas for tank cover protects the inside of the for tank and effectively prevents sand and dust.Fuel cap keeps dirt water out of your fuel for tank. Use high quality material to keep the engine running smoothly. The fuel for tank door is effectively prevent scratches. Durable and will not rust, corrode or peel off. Resistant to gasoline and other hazardous chemicals. Specifications: Material:Aluminum Alloy Size: Approx.5x5x2cm/1.96x1.96x0.78inch Type: Blue DEF Cover Type: Green for Diesel Cover Type: 2 packs Type: two packs with accessories for 2500 3500-Cummins 2013-2017 Package Includes: 1x Fuel for Tank Cap note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.