This product is formed from a variety of diverse parts. Its frame is the high-quality aluminum, in its internal installation of 65mm or 45mm long aluminum spindle. Its timber is the heat reflective aluminum alloy, the surface use of international standards fluorocarbon coating that can reflect 97% of the sun radiation, effectively block ultraviolet light. Its closed leaves can reduce the positive air pressure, not easily affected by wind. It is characterized by long life, easy maintenance, easy to install, can be arbitrarily adjusted the louvers. It belongs to shading device, while installed outside of the balcony, windows and glass curtain wall. We can make the shading device to sliding forms and collapsible forms.