The Case-IH 451590R91 is a genuine OEM ball bearing designed for various agricultural and construction machinery, including Case-IH tractors, combines, and cotton pickers. This essential component ensures smooth rotational movement and reduces friction in critical applications. It features an inner diameter of 20 mm, an outer diameter of 47 mm, and a width of 14 mm, with a weight of approximately 0.09 kg. This high-quality bearing is a direct replacement for original equipment, ensuring reliable performance and durability.