This product acts as filters between the indoors and the outdoors, facilitating the users providing appropriate shade, sunlight, ventilation, and a visual union with the world in motion outside. It delivers an excellent solution to extending the service life of the products inside. The heavy-duty work which man can never do can be done by this product. With the aid of this product, such jobs can be done easily. It delivers an excellent solution to extending the service life of the products inside.