The FAMCO VSA Louvered Foundation Vent with Screen – Aluminum promotes free air movement in a crawl space or attic installation. Made with a hemmed edge for strength and includes a 1/8 inch screen. (A 1/4 inch screen is available.) Quality constructed in .020 gauge Aluminum. The FAMCO VSA Louvered Foundation Vent with Screen is available in sizes 4×16 inch, 6×16 inch, 8×16 inch and includes a large mounting flange. Sold in 5 pieces per box. The FAMCO VSA Louvered Foundation Vent with Screen is manufactured by Famco in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product or the variations available, please refer to the FAQs above or feel free to contact us by phone or email.