The McCormick 6637678A1 is a genuine OEM bearing designed for various McCormick agricultural machinery, including models in the X4, X5, and X6 series. This high-quality replacement part ensures reliable performance and proper functioning of critical components, contributing to the longevity and efficiency of your equipment. Manufactured to McCormick's stringent specifications, it provides a precise fit and exceptional durability with an outer diameter of 80mm, inner diameter of 40mm, and a width of 18mm.