Specification :

1) the louver blades are available in aluminum types;
2) the angle of ventilation can be changable by the manual setup;
3) Fixed window coupled with the swing window;
4) Adopt heat insulation technical material;
5) Adopt the isobaric principle;
6) Side-lite, top transom units for special installations;
7) Surface treatment: oxidation, electrophoresis painted, fluorocarbon spayed, mill finish, matte finish, powder coated;