16"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 15.75"h] white + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 14" x 14" is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 15 3/4" x 1"

actual front end outer dimensions are 27

this grille offers durability and resistance to rust and corrosion

+ Product Details Size – 16" x 28" or 28" x 16" is the size for the duct opening measurement only

16"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 17.75"w x 15.75"h] white + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 14" x 14" is the size for the duct opening measurement only Actual Filter Size – 33 3 4"w x 15 3 4" x 1"