The Peterbilt 4 Inch Fuel Cap is a practical and reliable solution for your fuel tank needs. Available in both locking and non-locking options, this non-vented fuel cap includes a pressure relief lever for added convenience. With a 4-inch diameter, it fits most Peterbilt fuel tanks seamlessly. Whether you're a truck driver or a fleet manager, this fuel cap offers peace of mind and ensures a secure and efficient fueling experience. Trust the Peterbilt 4 Inch Fuel Cap for its durability and functionality.