PLSLBL 16" x 8" Plastic Foundation Vent With Slider, Black, 45 SQIN Of Net Free Area Per Piece, Foundation Vent Manually Slides Open & Close, Replaces a 16" x 8" Block In The Foundation To Allow Air To Flow Across The Foundation To Help Prevent Heat & Moisture Build Up In the Crawl Space, Vent is Screened.
