... your house.4.Aluminum surface color: we have many colors for you choose,white,silver,black,champagne,bronwn,etc. You can ... ,PVDF coating,electrophoresis and also anodizing. PVDF coating is especially for windows and doors close to island,have the anti-corrosion function ... origin. So the window can bear enough weight and use for a long time.8.Performance parameter: 1.Sound insulation:RW ...