12" x 18" Gable Louver, 28 Gauge Galvanized Steel, 1 Piece Construction With A 2" Thick Frame, 1/4" Galvanized Wire Mesh, 63 SQIN Net Free Vent Area, Ventilates 131 SQFT, Rough Opening: 12-1/4" x 12-1/4", Nailing Flange At 7/8" Back For Stucco Applications, Conforms To Federal Spec QQ-5775A, Type 1, Class 4 ASTM A-527 & Meets FHA Codes.
