... of our Products ? MaterialCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available.Carton steel is high quality iron,such as ... shiny brass , pure copper,such as H62,H65,H68...Aluminum is good Aluminum.Meanwhile,we can use other materials accordingto customer's ... with more than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2.Our company had good ...