14"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 15.75"W X 13.75"H] Aluminum /* more inner breathing room Product Description Enhance your CRFG68 Victorian Floor Registers

/* more inner breathing room */ border-radius: 6px

+ Product Details Size – 12"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 29 3/4" x 1"

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+ Product Details Size - 14"w X 4"h is the size for the duct opening measurement only

14"W X 12"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 15.75"W X 13.75"H] Aluminum * more inner breathing room Product Description Enhance your CRFG68 Victorian Floor Registers * more inner breathing room * border radius: 6px + Product Details Size – 12"w X 18"h is the size for the duct opening measurement only