26"W X 32"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 27.75"W X 33.75"H] w8h8 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 5

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+ Product Details Size - 14"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 36"h is the size for the duct opening measurement only

26"W X 32"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 27.75"W X 33.75"H] w8h8 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 20"w X 14"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 5