34"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 25.75"h] Color_Anodized Aluminum Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 21 3/4" x 1"

+ Product Details Size – 12" x 34" or 34" x 12" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 5

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

+ Product Details Size - 34"w X 10"h is the size for the duct opening measurement only

34"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 25.75"h] Color_Anodized Aluminum Actual Filter Size – 27+ Product Details Size 34"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 25. 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