... ,complexity 4.OEM,Non-standa Powder metallurgy double gears 1.metal gears:iron , stainless steel 2.Size: ... 1-90 mm3.Small module,complexity4.we will OEM for you, ... pls send us drawings .Thank you ! materialsizesteel,iron,304,316,45#, ... include various kinds of gears and gear box.HENGKO Powder Metallurgy gear includes: bevel gear, gear, gear box ...