1,operator panel, aluminium panel, operation panel. 2,extrusion aluminium CNC machining 3,ISO9001 certified 4, ... , door bell panel, aluminium alloy panel, operator panel, aluminium panel, operation panel. Material; A 6061Aluminium alloy composition: AlloySiFeCuMnMgCrZnTiOtherRemain60610.4-0.80 ...