Roller window screens are simple and efficient blinds that offer superior control against insects and dirt. They are also known by the name of roller blinds, window blinds, Venetian blinds, roman blinds or vertical blinds or even simply as roller screens. Window Screen Material can be installed on any type of existing frame. It can be fixed inside or on the surface of the surrounding frame – recessed mounting or front fix. 100%Polypropylene Dual weather stripping to seal the screen fabric inside the aluminum side tracks and top profile.