This is a genuine McCormick part number 6725983A1, identified as a hydraulic cylinder rod. It is designed for various McCormick X-series tractors, including models X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X4.80, X4.90, X5.20, X5.30, X5.40, X5.50, X5.60, X5.70, X6.420, X6.430, X6.440, X6.460, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680. The rod measures 440 mm in length with a diameter of 35 mm, ensuring precise fit and reliable hydraulic system operation.