34"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 31.75"h] 10in diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 20" Or 20" x 34" duct opening (measured at the opening)

actual front end outer dimensions are 19" Width X 19" Height

Design – Removable face for cleaning and access to damper - wooden damper for airflow shutoff control

Operating temperature from -40°f to +248°f [-40°c to +120°c]

+ Product Details Size – 28"w X 32"h is the size for the duct opening measurement only

34"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 31.75"h] 10in diameter + Product Details Perfect Fit+ Product Details Size 34"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 31. 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