✪ DIESEL cap fit 2019 2020 2021 2022 2023 2024 2025 Dodge Ram 1500 2500 3500 diesel trucks， with a cap less fuel system, Cummins and Eco-diesel vehicles with 3.0L V6 engines.. ✪ AIRTIGHT & PRECISION Fit - Our diesel fuel caps are well sealed and can keep out dust, water, rain, snow and others to protect your fuel system,saving you costly engine repairs. ✪ SAFE & DURABLE - DIESEL cap are crafted with anodized billet aluminum which won't be impacted even after long-term exposure. ✪MAGNETIC - Strong permenant neodymium magnet holds the cap to the truck while you fill up ✪ LIFETIME WARRANTY-If you have any problems please feel free to contact with us. Aluminum Blue DIESEL cap, Non-magnetic Blue DEF Cap for 2019-2026 Dodge Ram Diesel Trucks