16"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 19.75"h] Round Damper Ring Control Your Airflow on drop

Control Your Airflow on drop ceiling grilles

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 28" OR 28" X 16" duct opening (measured at the opening)

+ Product Spec Sheet Aluminum Return Filter Grille Spec Sheet

Actual Front End Outer Dimensions Are 14" Width X 8" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Size – 24"w X 12"h is the size for the duct opening measurement only

16"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 19.75"h] Round Damper Ring Control Your Airflow on drop+ Product Details Size 16"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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