10"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 27.75"h] Width_20in + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

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

+ Product Details Size – 36"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 30"h X 2"d (for duct opening measurement only)

+ Product Details Outer dimensions: 15

+ Product Details Size - 12"w X 10"h is the size for the duct opening measurement only

10"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 11.75"w x 27.75"h] Width_20in + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 32"w X 36"h is the size for the duct opening measurement only + Product Details Size – 36"w X 12"h is the size for the duct opening measurement only