Long life span (10-30 years), Noise insulation, various colors for choice Security, can be closed and ... Characteristic: 1) Long life span (10-30 years), Noise insulation, various colors for choice.2) Durable, no deformation, no ... .6) Surface treatment: Anode Anodizing, Electrophoresis Coating, Powder Coating, PVDF Painting, Break-Bridge and Heat Insulation, Film Attaching.7) Accessory system: High ...