Photo 1 of **factory sealed** 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct Opening

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Photo 1 of **factory sealed** 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct OpeningPhoto 2 of **factory sealed** 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct OpeningPhoto 3 of **factory sealed** 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct Opening