aluminum profile ,it's made in aluminum alloy ,and the coating by power Aluminum profileIt's made in aluminum alloy ,so it's stronger ... anodizing, black,golden,champange, bronze ect)shortl anodizing. (all kinds of dye anodized)like copper anodizedsandblasting anodizedelectrophoresis,polishing,brush,powder ... , communicating products, construction, decoration and industry usage etc. aluminum profile