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