EFFECTIVE WINDOW SCREEN:Suitable for all window types, Aluminum window frame, wrought iron grills, sliding window, casement window, louvre bathroom/toilet window and even grilled gates and balcony. It is Polyester Fire-Retarded Meshwhich is different from fiberglass meshit basically does not emit dense smoke when it burnsand the dense smoke of fiberglass mesh is very large. Screen replacable and washable EASY TO MAINTAIN:For spring cleaning, just remove the window mesh from the window and give it a good rinsing before installing it back onto the window to air dry THE SIZE CAN BE ADJUSTED BY YOURSELF: Measure your window before ordering to be sure our screen will fit. Buy slightly larger than the specifications of the window frame. Bigger can be cut into smaller ones.