The product is a genuine OEM Cummins engine piston designed for the ISX15 X15 diesel engine. It is specifically manufactured by Cummins and is compatible with Cummins equipment. This high-quality piston is a crucial component for maintaining and repairing heavy equipment and industrial machinery that runs on Cummins engines. With this product, you can trust that your engine will continue to perform at its best, ensuring smooth operation and durability in demanding work environments.