34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 29.75"h] Material_Anodized Aluminum + Product Details Size –

+ Product Details Size – 24" x 30" or 30" x 24" is the size for the duct opening measurement only

Design – Circular return valves - designed to be used in low and medium pressure ventilation air conditioning systems

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 30" or 30" x 6" duct opening (measured at the opening)

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 29.75"h] Material_Anodized Aluminum + Product Details Size –+ Product Details Size 34"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 29. 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