The RHI&A PT10021 is a durable aftermarket 10-tooth sprocket designed with a 28.575 mm (1-1/8 inch) round bore. This sprocket serves as a direct replacement part for various agricultural planters, including John Deere 7000, 7100, 7200, 7300, 1700, 1710, 1720, 1730, 1750, 1760, 1770, 1780, 1790 series, Kinze 2000, 3000, 4000 series, White 6000, 8000, 9000 series, and Case-IH 800, 900, 950, 1200 series planters. It is an equivalent to OEM part numbers such as John Deere AA20500, Kinze GD1002, White 854001, and Case-IH 87400971.