32"W X 10"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 33.75"W X 11.75"H] Return Grille Some of the best features 4 X 12 Is CRFG2028 Width_14in

Some of the best features aren't readily apparent

+ Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only

+ Product Details Size – 12"w X 8"h is the size for the duct opening measurement only

simplifying maintenance

+ Product Details Size - 18"w X 34"h is the size for the duct opening measurement only

32"W X 10"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 33.75"W X 11.75"H] Return Grille Some of the best features 4 X 12 Is CRFG2028 Width_14in Some of the best features aren't readily apparent + Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only