30"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 33.75"h] 8in diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening)

+ Product Details Size - 20"w X 6"h is the size for the duct opening measurement only

resisting rust and wear while adding a sleek

Actual Filter Size – 27 3/4"w x 5 3/4" x 1"

these airflow control components provide you with effortless control over your indoor environment

30"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 33.75"h] 8in diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in + Product Details Perfect Fit & Easy Sizing Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening) + Product Details Size 20"w X 6"h is the size for the duct opening measurement only