30"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 15.75"h] Compatible With Duct 12in + Product Details Size - const content item 1-Way CRFG3630

+ Product Details Size - 30"w X 20"h X 2"d (for duct opening measurement only)

+ Product Details Size - 26"w X 16"h is the size for the duct opening measurement only

Width vs Height:

The powder-coat finish lends a smooth

+ Product Details Size - 12"w X 18"h is the size for the duct opening measurement only

30"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 15.75"h] Compatible With Duct 12in + Product Details Size const content item 1 Way CRFG3630 + Product Details Size 30"w X 20"h X 2"d (for duct opening measurement only) + Product Details Size 26"w X 16"h is the size for the duct opening measurement only