UltraEco 20% Silver is a fully metallized mirrored window film that prevents large amounts of solar heat gain, it is very cost effective, yet boasts high quality and performance, along with a life expectancy that will outlast a generation. Its down fall would be its high internal reflection that creates a mirrored appearance when the sun goes down. It is used almost exclusively in the commercial sector for large scale installations that require heat rejection first and foremost, usually in buildings that are rarely occupied at night. Roll length is 30.5m. Pre-cut available in any length, by the roll widths available.