The Case IH 663887R91 is a genuine OEM pulley designed for various Case IH agricultural machinery, including a wide range of tractors, cotton pickers, and windrowers. This original replacement part ensures optimal performance and durability. With an outer diameter of 100 mm, an inner diameter of 25 mm, and a height of 30 mm, this pulley weighs approximately 0.36 kg and is crucial for the proper functioning of the machine's drive systems.