The McCormick 6606422A1 Circle is an authentic OEM replacement part designed for various McCormick X4 and X5 series tractors. This genuine component ensures optimal functionality and durability, maintaining the performance standards of your agricultural machinery. It is compatible with McCormick models such as X4.30, X4.40, X4.50, X4.60, X4.70, X4.70M, X4.70L, X4.80, X4.80L, X4.90, X4.90L, X5.20, X5.30, X5.40, X5.50, and also fits certain Landini 4- and 5-series tractors.