The Case IH 533721R1 is a genuine OEM pinion designed for use in the transmission and axle assemblies of a wide range of International Harvester agricultural machinery. This critical component ensures reliable power transfer and smooth operation. It is compatible with numerous tractor models including the 460, 560, 706, 806, and many more, as well as specific cotton pickers, strippers, and windrowers. Weighing approximately 0.45 kg, this robust pinion is built to meet original equipment specifications for durability and performance.