Witten Vent 510BL Foundation Vent, 15-1/4 in W, Polypropylene, Black Oxide
Size of 7-3/4 in x 15-1/4 in so it easily fits the standard 8 in x 16 in block foundation opening.
Size of 7-3/4 in x 15-1/4 in so it easily fits the standard 8 in x 16 in block foundation opening.