Gear 1.TS 16949 audited manufacturer 2.OE quality 3.We are able to manufacture all types of gears ... steel , stainless steel , aluminum alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron specifiedStandardASTM , AISI , BS , DIN , JIS , NFProcessInvestment casting , die ... analysis, hardness testing, tensile testing, impact testing.CertificateISO9001:2000 / TS16949 High quality gear