14"W X 12"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser - [Outer Dimensions: 15.6"W X 13.6"H] 14" Round Duct Pipe + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 14" x 14" is the size for the duct opening measurement only

+ Product Spec Sheet Aluminum Return Grille Spec Sheet

+ Product Details Size – 12"w X 36"h is the size for the duct opening measurement only

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+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

14"W X 12"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 15.6"W X 13.6"H] 14" Round Duct Pipe + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 14" x 14" is the size for the duct opening measurement only + Product Spec Sheet Aluminum Return Grille Spec Sheet