24"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 25.75"w x 25.75"h] Color_Anodized Aluminum actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 38 5/8" width X 32 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 26" or 26" x 8" duct opening (measured at the opening)

+ Product Details Size - 16"w X 18"h is the size for the duct opening measurement only

easy installation

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24"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh Black [Outer Dimensions 25.75"w x 25.75"h] Color_Anodized Aluminum actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 38 5 8" width X 32 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 26" or 26" x 8" duct opening (measured at the opening)