HOME > General Shutters > AI Dual-extruded (Heat Insulating) Shutter   ·Provides protection from wind pressure/crime prevention (for windows) The Aluminum Dual-extruded (heat insulating) shutter made of AL6030T5 is resistant to wind pressure and features dual-extruded slats. It is suitable for power plants that are regularly subjected to severe wind pressure, buildings around or near the coast, large-scale logistics centers with many open areas, factories, military bases, department stores, crime prevention in shopping malls, residential buildings, and garages.