This 4-inch fuel tank strap isolator is designed to fit between the fuel tank and the mounting strap on semi-trailer trucks. It acts as a protective barrier that prevents metal-to-metal contact, reducing wear, vibration, and noise. Made from high-quality rubber, this isolator provides excellent resistance to oil, heat, and environmental damage, ensuring long-lasting durability. Ideal for replacing worn or damaged isolators during fuel tank maintenance or installation.