6"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 33.75"h] Powder-Coated + Product Details Size - LO246 Product Details Size 32 Compatible with Duct 4"

+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 27 5/8" height

warehouses

Actual Filter Size – 9 3/4"w x 31 3/4" x 1"

6"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 7.75"w x 33.75"h] Powder Coated + Product Details Size LO246 Product Details Size 32 Compatible with Duct 4" + Product Details Size 40"w X 20"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 24 5 8" width X 27 5 8" height