POAX Seed Hopper Drive Gear for Farmall Side Mount Planter Attachments.  Commonly used on IH Farmall 140,  130,  Super A,  100,  Cub,  Super C,  200,  230,  and Other Tractor Models.

ONLY used on POAX Style Seed Hoppers with a Cotton Bottom.   POAX style seed hoppers came with a corn / bean seed bottom or a cotton bottom.  This drive gear is NOT needed if your POAX seed hopper has a corn / bean bottom.   Last photo shows how the gear mounts and the POAX style seed hopper. 

Case IH part number CPA5159.