Bestvents PMS-1BLACK Foundation Vent, 40 sq-in Net Free Ventilating Area, Mesh Grill, Polypropylene, Black

With 18 in L x 1 3/4 in W built-in lintel for new block, brick or frame foundation construction. Durable polypropylene construction. 40 sq-in net-free area. 1/8 in aluminum screen. 8 in x 16 in.