This is a genuine Cummins M11 ISM11 QSM11 diesel engine belt tensioner with part number 3691280. It is a high-quality replacement for your vehicle’s accessory belt system. The tensioner is designed to fit perfectly and provide reliable performance for your Cummins engine. The brand of this tensioner is Cummins, and it is made in the United States. This product is perfect for those who need to replace their accessory belt system and want to ensure that they are getting a high-quality replacement part.