The McCormick 4221758M91 is a genuine OEM lever designed for a wide range of McCormick X-series tractors. This essential component ensures reliable and precise operation within the tractor's control system. It is specifically compatible with McCormick X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X4.70M, X4.70F, X4.70N, X4.80, X4.80F, X4.80N, X4.90, X4.90F, X4.90N, X5.20, X5.30, X5.40, X5.50, X5.55, X5.60, X5.65, X5.70, X5.75, X6.40, X6.45, X6.50, X6.55, X6.60, X6.65, X6.70, X6.75, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680 models, providing an exact fit and optimal performance.