MeshGuard Galvanized Steel Strips provide added strength and stability to your MeshGuard Porch Screen System. One order comes with twenty - 8' steel strips. The Steel Strips need to be added in the process of installation after the Base is installed. Just cut to needed size to match the lenght of the Base and drill fasteners to attach directly to the porch. Must use all MeshGuard components to meet approved building codes, which include MeshGuard Base, Screen Tight Cap, MeshGuard Strip, MeshGuard Screen Material, MeshGuard Flat Spline and MeshGuard Self Drilling Screw. All of these items are available on our website.