HIGH QUALITY MOSQUITO SCREEN MESH—Glass fiber PVC, adopt flat weaving technology, and after high temperature forming, chemical corrosion resistance, good shape, non slipping wire, beautiful and durable; Polyester fiber + flame retardant. BUG DOOR AND WINDOW SCREEN NET—Thickened material, durable, in light weight, cost-effective. The window screen mesh is 17 X 15 (apertures per square inch), good for blocking out mosquitoes, bugs, insects without blocking fresh air-flow. ADJUSTABLE SCREEN INSECT MESH—Good dimensional stability, moderate hardness, smooth, not easy to shrink and deform, easy to fix. A good screen mesh for all screening applications:window screen repair, screen door, porch screen, patio screening, insect screening, pet screen, and other professional and DIY screening applications.CUSTOM FLY BUG SCREEN WINDOW—Good toughness, strong impact resistance, easy to install. Easily cut to any shape and size you need. If you want to install it on windows or doors, please refer to the installation method in the picture.You have to stich the regular loop with the mesh net before installation.