12"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 17.75"h] Color_R-8.0 Pink + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 12" or 12" x 6" duct opening (measured at the opening)

+ Product Details Size – 34"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 8 5/8" height

order a 14x20 grille

12"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 17.75"h] Color_R-8.0 Pink + Product Details Perfect Fit+ Product Details Size 12"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 17. 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