12"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 33.75"h] 3-Way or 4-Way + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 12"w X 34"h X 2"d (for duct opening measurement only)

5"w X 12"h]

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 18" OR 18" X 14" duct opening (measured at the opening)

actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height

this grille offers durability and resistance to rust and corrosion

12"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 13.75"w x 33.75"h] 3 Way or 4 Way + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 12"w X 34"h X 2"d (for duct opening measurement only) 5"w X 12"h]