The 1851800M91 bearing is a genuine OEM replacement part designed for various agricultural applications, including Massey Ferguson, Landini, McCormick, Case IH, and Fiat tractors. This high-quality bearing ensures smooth operation and durability, featuring an inner diameter of 45mm, an outer diameter of 85mm, and a width of 19mm. It is a direct fit for numerous Massey Ferguson tractor models across the 100, 200, 300, 500, 600, 1000, 2000, 3000, 4000, 5000, 6000, 7000, and 8000 series.