The INA Belt Tensioner Assembly - 5340432100 is a product used in automotive engines to maintain proper tension on the engine belt. It is designed to keep the belt tight and prevent it from slipping, which can cause damage to the engine components. This assembly includes a tensioner pulley, spring, and mounting hardware for easy installation. The tensioner pulley is made of high-quality materials to ensure durability and longevity. It is compatible with various makes and models of vehicles and is an essential component for ensuring smooth and efficient engine performance.