There is no problem of quality level control all of our products are 10.9 and 12.9 high strength fastener. S40Cr material is used on 10.9 class fasteners and material ML20MnTib is used on 12.9 class....
We are a factory located in Qingdao, China.We are specilized in manufacturing various curved plywood furniture and components, including chairs, kids furniture, seats and backs.Now we have developed....