aluminium cover. 2,extrusion aluminium CNC machining 3,ISO9001 certified manufacturer. 4,20 years experience 5,OEM/ODM Application range; aluminium housing,alumnium out cover, alumnium speaker out case, aluminium panel, operation panel, metal shell case, metal housing box. Material; A 6061Aluminium alloy composition: AlloySiFeCuMnMgCrZnTiOtherRemain60610.4-0.80.70.15-0.40.150.8-1.20.04-0.350.25 0 ...