This belt tensioner pulley with part number 4936440 is designed to fit perfectly for Cummins engines. It is a high-quality replacement part that ensures your engine runs smoothly and efficiently. The pulley is made in China and comes with OE/OEM and manufacturer part numbers. This tensioner pulley is an essential component of your engine's accessory belt system. It helps to maintain the proper tension of the belt, which ensures that all accessories are running smoothly. This pulley fits perfectly for Cummins engines and is compatible with multiple models. Get this high-quality replacement part now and keep your engine running like new.