16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 35.75"h] Powder Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 22" x 36" or 36" x 22" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 35

+ Product Details Size - 20"w X 24"h X 2"d (for duct opening measurement only)

listed size +1

+ Product Details Size - 36"w X 30"h is the size for the duct opening measurement only

16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 17.75"w x 35.75"h] Powder Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 22" x 36" or 36" x 22" is the size for the duct opening measurement only actual front end outer dimensions are approximately 35