The Peterbilt Leak Defender and Anti-Siphon is a practical and reliable solution for preventing fuel cap leaks and fuel theft. This 3-piece fuel tank adapter system includes a collar, fuel cap, and anti-siphon tube, all designed to fit most Peterbilt makes and models. Made in the USA, this product is built to last and effectively stops fuel cap leaks while also deterring fuel theft. With its easy installation and high-quality construction, the Peterbilt Leak Defender and Anti-Siphon is a must-have for any Peterbilt owner looking to protect their fuel tank.