This is a genuine OEM McCormick spring, part number 6719674A1, designed for various McCormick X-series agricultural tractors. It ensures proper function and durability for critical machine systems. This authentic McCormick component is compatible with models including X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X5.100, X5.110, X5.120, 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.