The McCormick 3543681M91 is a genuine OEM V-belt designed for optimal performance and durability in a wide range of agricultural and industrial machinery. Measuring 1350mm in length and 12.5mm in width, this high-quality belt ensures reliable power transmission for critical engine components. It is compatible with numerous McCormick, Massey Ferguson, Valtra, Fendt, and Challenger tractor models, serving as a direct replacement for original equipment. This belt is also cross-referenced with equivalent part numbers from Perkins, ensuring broad applicability and confirmed fitment across multiple brands.