18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] w36h36 + Product Description Enhance your

+ Product Description Enhance your HVAC system with our premium Aluminum Double Deflection Adjustable Air Supply Diffuser

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 8" OR 8" x 20" duct opening (measured at the opening)

Designed with durable

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

18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] w36h36 + Product Description Enhance your+ Product Details Size 18"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 33. 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