1.ISO system certification. 2.Material:Stainless steel,Carbon steel. 3.OEM/ODM orders are welcome. Cnc Lathe Part ... , tensile force tester,etc 3 ) Materials:Different kinds of stainless steel, (303,304, 316 Etc) Brass ( C3602, C3604, lead-free, ... Etc) , aluminum( 6061,6063 Etc.) , steel, etc. 4) Finish: Anodized, Polishing, zinc plated , nickel plated , Chrome ...