The Kenworth Leak Defender is a practical and reliable solution to prevent fuel cap leaks. This 3-piece fuel tank adapter system includes a collar, fuel cap, and sealing insert, all sold separately. Designed to fit most Kenworth makes and models, this product is made in the USA and ensures a secure and leak-free fueling experience. With its high-quality construction and easy installation, the Kenworth Leak Defender provides peace of mind and saves you from potential fuel wastage and environmental hazards. Trust this efficient and durable solution to keep your fuel system intact.