18"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 21.75"h] with filter For a visual guide on Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

For a visual guide on how to measure your vent hole before ordering a grille

+ Product Details Size - 28"w X 36"h X 2"d (for duct opening measurement only)

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

Its heavier gauge construction guarantees durability and longevity

transparent design and durable construction

18"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 21.75"h] with filter For a visual guide on Compatible With Duct 7in Applications This sheet metal DDAG A 1212 For a visual guide on how to measure your vent hole before ordering a grille + Product Details Size 28"w X 36"h X 2"d (for duct opening measurement only)