The McCormick 6618700A1 is a genuine OEM idler pulley designed for optimal performance in McCormick CX series tractors. This essential component ensures proper belt tension and routing, contributing to the efficient operation of various engine systems. With an outer diameter of 120mm, an inner diameter (bore) of 17mm, and a width of 30mm, this pulley is also compatible with a wide range of Case IH JX series and New Holland TD/TL series agricultural machinery, providing reliable power transmission.