BUILDERS EDGE 140037079001 Exhaust Vent, 12 sq-in Net Free Ventilating Area, White

For side walls with patented exhaust flaps which stay closed when not in use; durable, maintenance free, U.V. stabilized and constructed with color molded-through so they won't scratch, flake or fade; comes complete with 8 aluminum tube (4 diameter); optional: small animal guard sold separately; net free area 12 sq. inches; Limited Lifetime warranty. Made in USA.A high-quality finish, thanks to the patented lock-on trim ring. Available with scalloped or square corner details. Patented exhaust flaps stay closed when not in use.