The Case-IH 47780090 is a genuine OEM idler pulley designed to maintain proper belt tension and smooth operation in various Case-IH agricultural machines. This critical component helps prevent belt slippage and wear, contributing to the longevity and efficiency of the engine or accessory drive system. With an outer diameter of 110 mm, a width of 32 mm, and an inner diameter of 17 mm, it provides reliable performance across compatible models.