Product Details: The Dayco Serpentine Light Duty Timing Belt Idler / Tensioner Pulley is perfect for your light duty timing belt needs. This pulley is designed with lifetime lubricated ball bearings, double high temperature seals to ensure peak bearing performance and a grooved pulley that contains specially formulated glass-filled polymers to ensure a high strength. This pulley is designed to provide reliable performance and long-lasting durability. FleetPride is your First Click in Heavy Duty®.