The McCormick 706388A1 is a genuine OEM resistor designed for various McCormick tractor models. This essential electrical component ensures proper circuit function and is compatible with McCormick X4, X5, X6, X7, and X8 series tractors, including specific X4.20, X4.30, X4.40, X4.50, X4.60, X4.35, X4.45, X4.55, X4.30F, X4.40F, X4.50F, X4.30V, X4.40V, X4.50V, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.660 VT-DRIVE, X7.670 VT-DRIVE, X7.680 VT-DRIVE, X7.670 P6-DRIVE, X7.680 P6-DRIVE, X7.690 P6-DRIVE, X8.660, X8.670, X8.680, X8.660 VT-DRIVE, X8.670 VT-DRIVE, and X8.680 VT-DRIVE models.