... 4. Over 12 years' experience Product No./NameJJ-00005 / LED lamp component with precision cating and machining Manufacture Process1) Mould/Tooling ... ) etc.5) Surface Treatment: High quality polish, powder coating, Chrome/Nickel/Zinc(white, blue, yellow, black)plating, hot galvanized, ... etc...6) Tolerance: +/- 0.0005inch, also accord with GB6414 LED lamp component with precision cating and machining