Photo 1 of 30'' x 20'' Return Air Grille [Duct Opening Size] Return Vent Cover for Wall or Ceiling,Steel Return Air Grill Removable Face/Door for 1 inch Filters (30"W x 20"H [Duct Opening])

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Photo 1 of 30'' x 20'' Return Air Grille [Duct Opening Size] Return Vent Cover for Wall or Ceiling,Steel Return Air Grill Removable Face/Door for 1 inch Filters (30"W x 20"H [Duct Opening])Photo 2 of 30'' x 20'' Return Air Grille [Duct Opening Size] Return Vent Cover for Wall or Ceiling,Steel Return Air Grill Removable Face/Door for 1 inch Filters (30"W x 20"H [Duct Opening])