34"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 21.75"h] Powder-Coat + Product Details Size –

+ Product Details Size – 10"w X 20"h is the size for the duct opening measurement only

Design – This airflow control component are made to connect to HVAC diffuser and restrict airflow

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 20" OR 20" x 32" duct opening (measured at the opening)

actual front end outer dimensions are approximately 21

34"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 21.75"h] Powder-Coat + Product Details Size –+ Product Details Size 34"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 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