What is the purpose of the rubber straps under the metal straps on the fuel tank?

The purpose of the rubber straps under the metal straps on the fuel tank is to keep the tank from rubbing and getting holes. The rubber serves as a cushion between the metal straps and the fuel tank, absorbing vibrations and preventing direct contact that could lead to wear and tear over time. This is particularly important as constant motion and vibrations from the vehicle can cause abrasions on the tank's surface. The rubber material helps maintain the integrity of the tank, ensuring it remains leak-free and functional throughout its use. This design consideration is crucial for the longevity of the fuel tank and for overall vehicle safety.