22"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 15.75"h] Return + Product Details Size - 14" Round Duct Pipe FR M 414 White For 10 duct opening

+ Product Details Size - 28"w X 16"h is the size for the duct opening measurement only

our Circular Air Supply Valves are ideal for low and medium pressure ventilation air conditioning systems

With our extensive selection of Grilles

+ Product Details Size - 6"w X 26"h X 2"d (for duct opening measurement only)

+ Product Details Size - 25"w X 32"h is the size for the duct opening measurement only

22"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 23.75"w x 15.75"h] Return + Product Details Size 14" Round Duct Pipe FR M 414 White For 10 duct opening + Product Details Size 28"w X 16"h is the size for the duct opening measurement only our Circular Air Supply Valves are ideal for low and medium pressure ventilation air conditioning systems