12"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 15.75"h] Material_Steel + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 12" OR 12" x 36" duct opening (measured at the opening)

actual front end outer dimensions are approximately 20 5/8" width X 12 5/8" height

Design – rigid gauge built for durability and long life in mind

+ Product Details Size - 18"w X 34"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 32" OR 32" x 36" duct opening (measured at the opening)

12"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 15.75"h] Material_Steel + Product Details Perfect Fit+ Product Details Size 12"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 15. 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