... 4,high quality and low price Product name CD pattern Headphones shell Materials Available1. Stainless Steel: SS201, SS303 ... ) bearing, bearing seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization, heat treatment, polishing, nickel ... price .Mainly processing and manufacturing various kinds of metal parts and screw, nut, rivet of national standard ...