The product is a pack of 6 genuine Cummins fuel injector o-rings with copper tips, specifically designed for the ISX 15 and QSX15 models. Manufactured by Cummins® equipment and are identified by the manufacturer part numbers 2872717, 4955133, and 2872057. These high-quality o-rings are essential components for maintaining the proper function of heavy equipment, ensuring a reliable and efficient fuel injection process.