36"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 13.75"H] w22h22 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 4"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 24"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 32"h is the size for the duct opening measurement only

production and finish on all products

+ Product Details Size - 16"w X 20"h is the size for the duct opening measurement only

36"W X 12"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 37.75"W X 13.75"H] w22h22 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 4"w X 36"h is the size for the duct opening measurement only + Product Details Size – 24"w X 10"h is the size for the duct opening measurement only