20"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 9.75"h] Aluminum - Cube Core 75"H – fits a 20"

75"H – fits a 20" X 10" duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 34" OR 34" x 18" duct opening (measured at the opening)

Suitable For Floor

High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

actual front end outer dimensions are approximately 16 5/8" width X 34 5/8" height

20"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 9.75"h] Aluminum - Cube Core 75"H – fits a 20"+ Product Details Size 20"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 9. 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 wear