The McCormick 6669855A1 Piston Ring is a genuine OEM component designed for various McCormick agricultural tractors, including models in the CX, MC, MTX, and XTX series. This high-quality piston ring, with a 100mm bore and 3mm thickness, is crucial for maintaining proper engine compression and oil control, ensuring efficient and reliable operation. Manufactured to strict specifications, it provides a precise fit and long-lasting durability for critical engine applications.