30"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 19.75"h] d Its polished pre-finish gloss varnish

Its polished pre-finish gloss varnish not only adds to its appeal but also ensures easy installation

our Butterfly Damper simplifies the process of managing airflow

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height -

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

Crafted from robust 20-gauge steel

30"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 19.75"h] d Its polished pre-finish gloss varnish+ Product Details Size 30"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 19. 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