The Roller Cassette flyscreen system consists of a cassette which houses the flyscreen mesh.
The cassette also contains a tensioned spring which keeps the mesh taught and retracts it when not in use. This cassette is attached to two side guides which have integral brush pile strips. The side guides keep the mesh close to the window and the brush piles ensure that a complete seal is maintained. The mesh is pulled out of the cassette by a bottom bar which locks into the base of the side guides and again is sealed at the base with a brush strip.