... 1.What’s the specification of our Products ? MaterialsCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available.Carton steel is ... are 35,40CrMo,SCM435,10B38...Stainless steel is SS201,202,302,304,316...copper is shiny brass , pure copper,such ... New quality control equipments had brought to Enhance the strength of the quality control6. Certificate:Provide dimensions report,chemical report ...