6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 27.75"h] Grille ceiling height) 4 X 12 Is CRFG2028 Width_14in

ceiling height)

+ Product Details Size – 14" x 18" or 18" x 14" is the size for the duct opening measurement only

+ Product Details Size - 18"w X 16"h X 2"d (for duct opening measurement only)

+ Product Details Size – 25"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 7.75"w x 27.75"h] Grille ceiling height) 4 X 12 Is CRFG2028 Width_14in ceiling height) + Product Details Size – 14" x 18" or 18" x 14" is the size for the duct opening measurement only