... .Size:1-90 mm 3.Small module,complexity 4.OEM,Non-standard Powder metallurgy gear(PM gear) HENGKO LTD is specialized in manufacturing all kinds ... ,include various 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, miniature gears ...