Keeps blinds clean and works every time they are raised or lower. it is compatible with manually or motorized roller blinds. it is quick and easy to install, and can be carried out from inside the house without risks. the kit includes everything needed for installation in aluminum or pvc windows with exposed exterior frame: 2 side supports for direct installation on pvc, additions for installing said side supports on aluminum, a central support and additions, 2 bars 75 cm, and 1brush 150 cm. it also improves energy efficiency and prevents insects and bats from entrying into the shutter drum