30"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 37.75"h] Insulated Line please note that the total Compatible with Duct 4" RG1612AL actual front end outer

please note that the total outer dimensions of the grille measure 14" in diameter

actual front end outer dimensions are approximately 34 5/8" width X 24 5/8" height

+ Product Details Size - 14"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 34"w X 16"h X 2"d (for duct opening measurement only)

30"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 37.75"h] Insulated Line please note that the total Compatible with Duct 4" RG1612AL actual front end outer please note that the total outer dimensions of the grille measure 14" in diameter actual front end outer dimensions are approximately 34 5 8" width X 24 5 8" height