Witten PMD-1 8 In. x 16 In. Black Manual Foundation Ventilator with Damper and Lintel

Manual foundation ventilator with damper and built-in lintel protects against moisture and allows for the natural flow of fresh air under structures. Circulates fresh air and removes musty, moist air. Polypropylene construction. 1/8 In. aluminum screen. Push-pull smooth operating.