... Parts1. Product Introduction Item DescriptionNameCNC machining part:Copper machining part:Precision machining partMaterialBrass, Copper, Carbon steel, Stainless steel, Steel ... brass tube fittings, elbow, tee, nut; Auto-lathe turning precision part: precision electronic parts, fasteners, and other jeweler accessories(3) Main equipments ... .(5)Certificate: SGS ISO 9001:2008 Aluminum Precision CNC Parts