Air Vent AirHawk Roof Vent Carton of 6

SLP Slant Back Plastic: 17 inches x 18 inches flashing / NFA (square inches): 61/pc. / 9 inches opening SQP Square Plastic: 17 inches x 18 inches flashing / NFA (square inches): 61/pc. / Rain diverter throat / 9 inches opening SLA Slant Aluminum: fits a 3/12 to an 8/12 roof pitch / NFA (square inches): 50/pc. / 8 inches opening RVG 55 Slant Galvanized Static: Heavy-duty galvanized construction / NFA (square inches): 50/pc. / 8 inches opening RVG 53 High Collar Square Galvanized Static: Square, galvanized steel / NFA (square inches): 50/pc. / 8 inches opening Multiple roof vents are usually needed to provide the required net free area Must be spaced equally over the roof to provide sufficient airflow along the entire roof sheathing