DucoSun F is an external sun protection system made of extruded aluminium slats. The sun protection system is available as a rigid system (DucoSun F Intercostal or DucoSun F Multifit and DucoSun F Unifit) or as an adjustable system with drive (DucoSun F+). A special system allows the slats, which are assembled on site, to be individually set at various angles in 15 degree increments. The entire width and height of the building can thus be provided with optimal shading.