34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 17.75"h] w18h18 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 17.75"h] w18h18 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 24"w X 6"h Is The Size For The Duct Opening Measurement Only R Value Rating of Insulation R3