... than 7.5 M 4.Surface power coating aluminum profile for curtain wall1.Alloy Temper: 6063-T5 / T6, 6061 / 6005, 7005.2 ... -88, ISO6362/4-88, ISO7599-83, ISO3210-833.Commonly used for curtain walls.4.Surface Treatment: Mill finish, Anodized, Powder coating, PVDF ... coating, Electrophoresis, Silver, bronze, Champagne, bronze polished, silver polished, Wood grain, golden etc.5.Length: Less than 7.5 M ...