12" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 8" Diameter Actual Filter Size – 31 4 X 12 Is CRFG2028 Width_14in

Actual Filter Size – 31 3/4"w x 7 3/4" x 1"

High Standard Quality - Every part is hand inspected for quality before it is packaged

+ Product Details Size – 20"w X 30"h is the size for the duct opening measurement only

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+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

12" X 10" [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 8" Diameter Actual Filter Size – 31 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 31 3 4"w x 7 3 4" x 1" High Standard Quality Every part is hand inspected for quality before it is packaged