The McCormick 5106717 O-Ring is an authentic replacement component designed to provide a secure and leak-free seal in various McCormick X-series tractor applications. This essential part is compatible with a wide range of models including the X4, X5, X6, X7, and X8 series. It features precise dimensions of approximately 25.4 mm in length, 25.4 mm in width, and 12.7 mm in height, with a weight of 0.01 kg, ensuring optimal fit and performance. Always verify fitment with your specific McCormick tractor model.