... .folded or close edge 3.black,bright,silver screen 4.ISO9001 factory Aluminium Alloy Window Screen Features. a variety of colors available . corrosion ... -processing step, then final with oxidation coloring, and will get silver, dark blue, black and other colors.Main usage widely used ... petroleum, pipeline, package, all kinds of color14x1416x1618x18 Aluminum Alloy Window Screen