This is a genuine McCormick 6529958M1 Ring, an original equipment manufacturer (OEM) part designed for various McCormick tractor models. It ensures proper fit and optimal performance for the MC series (MC80, MC90, MC95, MC100, MC105, MC110, MC115, MC120, MC130, MC135), MTX series (MTX110, MTX120, MTX125, MTX135, MTX140, MTX150, MTX155, MTX165, MTX175, MTX185, MTX200), and X-series (X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.690) tractors.