1, ISO9001:2008 CERTIFIED. 2, Different kinds of gears, worm gears,Module from ... -M8 3, Material:C45, 40Cr. 42CrMo. GG25,316L. 1, ISO9001:2008 CERTIFIED.2, Different kinds of gears, worm gears3, Standard and ... price & prime quality & best service & timely shipments12) Accept trial order NEW OEM GEAR MANUFACTURER