Construction Metals GLPG1218G 12" x 18" Gable Louver 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 Manufactured in China