Vertical shades afford a precise control of the light with two movements: Open or close, and position. With a single command, the slats are regulated in keeping with the orientation of the sun, for maximum visual and thermal comfort. The slats (measuring 89 mm and 127mm) are delivered with a perfect separation between them. When in the closed position, they offer a perfect equidistant overlapping, for total protection from the impact of the light and heat. These are very versatile systems that adapt well to large openings, high ceilings and irregular surfaces, such as slants, cornices, staircases and curved spaces.