34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 29.75"h] Powder Coated + Product Details Size - CRFG2028 Width_14in 4 X 12 Is

+ Product Details Size - 36"w X 8"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 30" OR 30" x 18" duct opening (measured at the opening)

+ Product Details Size – 25"w X 14"h is the size for the duct opening measurement only

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

34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 29.75"h] Powder Coated + Product Details Size CRFG2028 Width_14in 4 X 12 Is + Product Details Size 36"w X 8"h X 2"d (for duct opening measurement only) actual front end outer dimensions are approximately 14 5 8" width X 38 5 8" height