The McCormick 6679726A1 Pulley is a genuine OEM component designed for various McCormick MC series tractors, including models MC80, MC90, MC95, MC100, MC105, MC110, MC115, MC120, MC130, and MC135. This essential pulley ensures efficient power transmission within the machinery. It is also cross-referenced with equivalent OEM part numbers for Case IH, Landini, Massey Ferguson, Same, and Valtra, highlighting its broad compatibility across agricultural equipment brands.