18" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 19.75"W X 7.75"H] Compatible With Duct 6in Actual Filter Size – 7 4 X 12 Is CRFG2028 Width_14in
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Description
18" X 6" [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 19.75"W X 7.75"H] Compatible With Duct 6in Actual Filter Size – 7 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 7 3 4"w x 35 3 4" x 1" 75"H – fits a 18" X 10" duct opening