12"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 37.75"h] rg1010 + Product Details Compact and

+ Product Details Compact and Secure Design - Measures 3-7/8" wide x 3-1/2" high x 3" deep

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

+ Product Details Size – 36"w X 20"h is the size for the duct opening measurement only

Rigid Built For External Use – The sturdy and rigid design features noise-free components that eliminate vibration and excess noise to the louvers

+ Product Details Size – 3"w X 10"h or 10"w X 3"h is the size for the duct opening measurement only

12"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 37.75"h] rg1010 + Product Details Compact and+ Product Details Size 12"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 37. 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