The McCormick 6657855A1 is a genuine OEM right rear light designed for various McCormick tractor models. This essential lighting component ensures visibility and compliance for the rear of the tractor. It is compatible with McCormick X4, X5, X6, X7, and X8 series tractors, including specific models like X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X5.20, X5.30, X5.40, X5.50, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.