Witten Automatic Vent Foundation Vent with Damper 500WH

Manual open air foundation vent with push-pull damper protects against moisture and allows for the natural flow of fresh air under structures. Circulates fresh air and removes musty, moist air. No motor needed. Easy to install with 4 screws. Durable ABS (Acrylonitrile Butadiene Styrene) plastic construction.