34"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 13.75"h] Compatible with Duct 8" + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 32"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 10"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 33

(Screws included)

+ Product Details Size – 30" x 36" or 36" x 30" is the size for the duct opening measurement only

34"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 13.75"h] Compatible with Duct 8" + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 32"w X 8"h is the size for the duct opening measurement only + Product Details Size 26"w X 10"h X 2"d (for duct opening measurement only)