34"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 35.75"h] w26h26 forEach(header => { header 4 X 12 Is CRFG2028 Width_14in

forEach(header => { header

actual front end outer dimensions are approximately 30 5/8" width X 26 5/8" height

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 12" or 12" x 14" duct opening (measured at the opening)

+ Product Details Size - 10"w X 24"h X 2"d (for duct opening measurement only)

34"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 35.75"h] w26h26 forEach(header => { header 4 X 12 Is CRFG2028 Width_14in forEach(header => { header actual front end outer dimensions are approximately 30 5 8" width X 26 5 8" height