... Product Introduction Item DescriptionNameCNC machining part:Copper machining part:Precision machining partMaterialBrass, Copper, Carbon steel, Stainless steel ... fittings, elbow, tee, nut; Auto-lathe turning precision part: precision electronic parts, fasteners, and other jeweler accessories( ... thread ring gauge and plug gauge and other regular gauges.(5)Certificate: SGS ISO 9001:2008 Aluminum Precision ...