The McCormick 3664478M1 is a genuine V-Belt designed for optimal performance and durability in McCormick agricultural machinery. Measuring 1060mm in length and 12.7mm in width, this essential component ensures reliable power transmission for various tractor applications. It is compatible with a wide range of McCormick X-Series tractors, including X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, 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 models. This belt is also cross-referenced as Massey Ferguson 3664478M1 and Landini 3664478M1.