1.ISO system certification. 2.Material:Stainless steel,Carbon steel. 3.OEM/ODM orders are welcome. Cnc Lathe ... tester, tensile force tester,etc 3 ) Materials:Different kinds of stainless steel, (303,304, 316 Etc) Brass ( C3602, C3604, lead ... , bike , computer, optical fiber products , medical equipment, mobile phone, Camera ,gas stove, gas heater, furniture etc. bolts screws stainless steel fasteners