The McCormick 3682252M1 is a genuine OEM piston ring designed for optimal engine performance and durability. This high-quality piston ring features a 90mm bore diameter and a 3mm thickness, ensuring a precise fit and reliable sealing within the engine cylinder. It is compatible with a wide range of McCormick CX, MC, and MTX series tractors, as well as numerous Massey Ferguson tractor models, including the 1000, 3000, 4000, 6000, and 8000 series. This critical engine component helps maintain compression, regulate oil consumption, and dissipate heat, contributing to the longevity and efficiency of your agricultural machinery.