Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 200B RATIO 30 TO 1 found under Gear Assembly Speed Decreaser by Charles Bond Company. The National Stock Number assigned to this part is 3010012163238, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 200B RATIO 30 TO 1.