3060883 Idler Pulley Fit for Cummins Diesel Engine M11 QSM ISM. For Cummins Diesel Engine M11 QSM ISM. Please be very careful to check our photos, make sure the photos showed is the same as you wanted. Please compare the part number with your. As so, your order is already taken in process of packaging by a specialist, who knows his/her job pretty well, in our warehouse. According to the product. If any suspicious information is spotted, please break in and let us know! We are eager to help, otherwise it gives us an illusion of nothing going wrong. We provide guarantee for most items. If the parts are damaged on the way or have fault, pls send problem description or take picture about problem, and our Customer Service and Technical Department will work it through with you. No worry, just make sure that day is in 30 days after item received and go to Open-A-Return. We, too, wonder that one. By the way, please forgive us refusing any return request in which the order is 31 days old or even older. Please do NOT leave negative or neutral feedback without any contact.