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

+ Product Details Size – 18"w X 26"h is the size for the duct opening measurement only

Every grille has a front end frame that will overlap at the wall joint

Filter Size - 29

actual front end outer dimensions are approximately 32 5/8" width X 10 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 26" OR 26" x 24" duct opening (measured at the opening)

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