Net Free Ventilating Area : 58 Sq-in Rough Opening Size : 17 In L X 17 In W Material : Polypropylene Color : White Length : 21-7/8 In Width : 21-7/8 In Suitable For : Molded-In Screen
Net Free Ventilating Area : 12.7 Sq-in Roof Pitch : 3/12 To 20/12 Material : HDPE Color : Black Length : 20 Ft Width : 11-1/4 In Suitable For : Asphalt Shingles, Cedar Shakes, Flat Tile, Metal And Stone Coated Steel
Net Free Ventilating Area : 480 Sq-in Air Flow Rate : 1000 Cfm Material : Steel Color : Black Installation Type : Roof Dimensions : 25 In L X 25 In W Suitable For : Attics Spaces Up To 1600 Sq-ft
Net Free Ventilating Area : 18 Sq-in/ft Roof Pitch : 3 Material : Polypropylene Color : Black Length : 4 Ft Suitable For : Roof Ridge Includes : 3 In Ring Shank Nails