This is a genuine McCormick 6638706A1 belt, specifically designed to meet the rigorous demands of McCormick X6, X7, and X8 series tractors. As an original equipment manufacturer (OEM) part, it guarantees optimal fit, performance, and durability, ensuring efficient power transmission within your agricultural machinery. Replace worn belts with this authentic McCormick component to maintain peak operational efficiency and extend the lifespan of your equipment.