14"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 21.75"h] 3-Way or 4-Way The total outer size of

The total outer size of this grille is the listed size plus 2 and 5/8"

each available in a variety of high-quality materials like brushed nickel

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

+ Product Details Size - 4"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 42 5/8" width X 22 5/8" height -

14"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 21.75"h] 3-Way or 4-Way The total outer size of+ Product Details Size 14"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 21. 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