Photo 1 of Howeall 12"W x 8"H [Duct Opening Size] Steel Return Air Grille, Air Return Vent Cover for Ceiling and Sidewall - HVAC Air Vent Covers - [Outer Dimensions: 13.75"W x 9.75"H]

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Photo 1 of Howeall 12"W x 8"H [Duct Opening Size] Steel Return Air Grille, Air Return Vent Cover for Ceiling and Sidewall - HVAC Air Vent Covers - [Outer Dimensions: 13.75"W x 9.75"H]