10"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 13.75"h] 3-Way or 4-Way + Product Details Size -

+ Product Details Size - 28"w X 26"h is the size for the duct opening measurement only

8-1/8"H x 4-5/8" W x 3-5/8"D

Seamless Installation: Designed to fit seamlessly into a 24 by 24 inch opening

+ Product Details Size - 14"w X 10"h X 2"d (for duct opening measurement only)

+ Product Details Size – 34"w X 6"h is the size for the duct opening measurement only

10"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 13.75"h] 3-Way or 4-Way + Product Details Size -+ Product Details Size 10"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 13. 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