Photo 1 of 12x12 Return Air Grille(Duct Opening Size),Air Return Vent Cover,Flat Vent Cover,Rejillas De Aire Acondicionado para Casa,Return Air Grilles,Outer Dimensions:13.75"Wx13.75"H(12"Wx12"H, Duct Opening)

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Photo 1 of 12x12 Return Air Grille(Duct Opening Size),Air Return Vent Cover,Flat Vent Cover,Rejillas De Aire Acondicionado para Casa,Return Air Grilles,Outer Dimensions:13.75"Wx13.75"H(12"Wx12"H, Duct Opening)