The Bosch 2006209905 is a genuine freewheel gearbox, also known as a starter pinion, designed for reliable engine starting. This essential component features 10 teeth, an outer diameter of 46.5 mm, an inner diameter of 12 mm, and an overall length of 51.5 mm. It operates with a clockwise rotation, ensuring proper engagement in compatible starter motors. This high-quality Bosch part is a direct replacement for numerous OEM part numbers from brands like CLAAS, DEUTZ-FAHR, FENDT, John Deere, and Perkins, making it suitable for a wide range of agricultural and industrial applications.