18"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 7.75"h] Compatible with Duct 10" actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 16 5/8" width X 14 5/8" height

+ Product Details Outer dimensions: – fits a duct opening

+ Product Details Size - 36"w X 32"h is the size for the duct opening measurement only

Suitable For Floor

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18"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 7.75"h] Compatible with Duct 10" actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 16 5 8" width X 14 5 8" height + Product Details Outer dimensions: – fits a duct opening