... :finest material and process. 4. Can design and manufacture gear wheel and sprocket wheel materialsizesteel,iron,304,316,45#,15#,A3,FN0208.SMF5020 ... kinds of gears and gear box.HENGKO Powder Metallurgy gear includes: bevel gear, gear, gear box, planetary gear, gear sector, sun gear, straight helical gear, helical gear, multi-layer gears ...