36"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 13.75"h] Powder-Coat It has an outer surface

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

+ Product Details Size – 24"w X 32"h is the size for the duct opening measurement only

Easy clean Healthy air flow for your HVAC system - noise free components - no vibrating louvers etc

+ Product Description Maximize HVAC efficiency with our aluminum eggcrate return air filter grille

75" width X 17

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