28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] 3-Way or 4-Way 75"H – fits a 20"

75"H – fits a 20" X 12" duct opening

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening)

actual front end outer dimensions are 22" width X 6" height

This thoughtful design ensures optimal air circulation for your HVAC system

28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] 3-Way or 4-Way 75"H – fits a 20"+ Product Details Size 28"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 11. 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