34"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 25.75"h] Color_Anodized Aluminum + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 20" OR 20" x 28" duct opening (measured at the opening)

+ Product Details Size – 12" x 34" or 34" x 12" is the size for the duct opening measurement only

Design – removable frame for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size – 25"w X 32"h is the size for the duct opening measurement only

34"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 25.75"h] Color_Anodized Aluminum + Product Details Perfect Fit+ Product Details Size 34"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 25. 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