The McCormick 3684559M1 is a genuine OEM ring designed for various agricultural machinery, including McCormick, Massey Ferguson, Fendt, Valtra, and Challenger tractors. This essential component ensures proper function within the specified systems. With an inner diameter of 40mm, an outer diameter of 45mm, and a thickness of 12mm, this durable ring is manufactured to meet original equipment specifications for reliable performance and precise fitment across a wide range of compatible models.