... 4,high quality and low price Product nameCD stria aluminum shell for Headphones Materials Available1. Stainless Steel: SS201, SS303, ... C51000, C52100, C54400, etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws, nuts ... and manufacturing various kinds of metal parts and screw, nut, rivet of national standard and non-national standard. ...