20"W x 20"H [Duct Opening Measurements] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 21.75"W X 21.75"H for 20x20 Duct Opening
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20"W x 20"H [Duct Opening Measurements] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 21.75"W X 21.75"H for 20x20 Duct Opening