... curtain walls 1.Material : 6063 6061 2.Temper:T5, T6 3.Length: Less than 7.5 M 4.Surface power coating aluminum ... -83 3.Commonly used for curtain walls. 4.Surface Treatment: Mill finish, Anodized, Powder coating, PVDF coating, Electrophoresis, Silver, bronze, Champagne, bronze polished ...