Typical of the oldest facades in our country, they allow the door or window to be opened to freshen the room in which they are installed while maintaining privacy and preventing the entry of any type of insect.  

They consist of a system of pinewood slats crimped together horizontally. Their operation is based on a simple mechanism for raising and lowering them with a cord.  

Made in rolls 10 metres long and 0.40 to 2 metres wide.