The McCormick 6686978A2 stirrup is a genuine OEM replacement part designed for various McCormick X-series tractors. This essential footstep provides secure and stable access to the operator's cabin, enhancing safety and convenience. Manufactured to original specifications, it ensures a perfect fit and long-lasting durability for models including X4.20, X4.30, X4.40, X4.50, X4.60, 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, X8.680, and X8.690.