The McCormick 3660736M1 is a genuine OEM ring designed for a wide range of McCormick agricultural tractors. This essential component ensures proper function and durability in models including the MC series (MC100, MC105, MC115, MC120, MC135), MTX series (MTX110, MTX120, MTX135, MTX150, MTX165, MTX185, MTX200), X60 series (X60.20, X60.30, X60.40, X60.50), X7 series (X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.660 P6-DRIVE, X7.670 P6-DRIVE, X7.680 P6-DRIVE, X7.670 VT-DRIVE, X7.680 VT-DRIVE), X70 series (X70.40, X70.50, X70.60, X70.70), X8 series (X8.660, X8.670, X8.680), and ZTX series (ZTX230, ZTX260, ZTX280). Rely on this authentic McCormick part for optimal performance and fit.