1,Material:aluminum 2,surface fininsh : Anodic oxidation of primary colors and black, engraving fonts 3,ROHS products Product name MP4 computer headset aluminum shell ... )4. Bronze: C51000, C52100, C54400, etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws, nuts ...