... door,aluminum side hung windows and doors,aluminium shutter,aluminum thermal break window and door,aluminum curtain wall.3.Surface ... Treatment: mill finish, anodized, powder coated, Electrophoresis, Thermal-break,wood-grained, etc.,4. Alloy: 6063A,6063,6061,6005 ... customers feel confident for our goods, we had got the certificate like QUALICOAT for powder coating and QUALANOD for anodize.A ...