TEKMARK Shutter is an elegant, flexible and high performance solution for external sun control. The highly durable cassette in performated aluminum sheet metal provides the user with optimal control of solar heat and light and at the same time provides the architect with a beautiful tool for creating a dynamic and attractive facade appearance. Key Features. Sliding shutter in aluminum perforated sheet. Frameless, lightweight panel. Perforated sheet metal filters direct sunlight, allows outward view and reduces solar radiation impact by 90%. Totally weather resistant and maintenance free panel. Reliable TEKMARK sliding accessories. Two functional perforation options offered as standard. Custom design perforations possible. Unlimited choice of colors offers great design flexibility. Manually operated or motorized.