The Fuel Oil Rail Puck Connector O-rings are high-quality replacement parts for 6.0L Ford Powerstroke engines. These O-rings are used to seal the fuel oil rail pucks, which are critical components in the fuel injection system. They are made of durable materials and are designed to withstand the high pressures and temperatures of the engine. These O-rings are easy to install and are a direct replacement for the factory parts. With a one year unlimited mileage warranty, you can trust that it's built to last. Replace your worn or damaged O-rings with these high-quality replacement parts and keep your engine running smoothly.