... colors and black, engraving fonts 3,ROHS products Product nameMetal Ear phone Materials Available1. Stainless Steel: SS201, SS303, SS304, SS316, SS416 ... ),gears (pinions, wheels ) bearing, bearing seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization, heat treatment, polishing, nickel ...