30"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 21.75"h] fixed bar + Product Details Size -

+ Product Details Size - 30"w X 34"h X 2"d (for duct opening measurement only)

and a control lever designed for seamless operation

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 22" Or 22" x 34" duct opening (measured at the opening)

30"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 21.75"h] fixed bar + Product Details Size -+ Product Details Size 30"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 21. 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