14"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 35.75"h] 18" Round Duct Pipe The unique sponge gasket ensures

The unique sponge gasket ensures an airtight seal

Actual Filter Size – 21 3/4"w x 15 3/4" x 1"

+ Product Details Size – 12"w X 20"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 34" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Size - 4"w X 16"h is the size for the duct opening measurement only

14"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 35.75"h] 18" Round Duct Pipe The unique sponge gasket ensures+ Product Details Size 14"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 35. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never