VEVOR Return Air Filter Grille, Fits W20 x H20 Inch Duct Opening, Filter Not Included, Return Air Vent Cover for Wall, Powder-Coated Steel Return Air Grill Detachable Face/Door for 1 inch Filters

VEVOR Return Air Filter Grille, Fits W20 x H20 Inch Duct Opening, Filter Not Included, Return Air Vent Cover for Wall, Powder-Coated Steel Return Air Grill Detachable Face/Door for 1 inch FiltersReturn Air Filter GrilleHow to MeasureEfficient Air ExchangeEasy to Replace and MaintainEasy InstallationMultiple Size OptionsInstallation Opening Dimensions: 19.9 x 19.9 in / 50.5 x 50.5 cm,Installation Opening Thickness: 1.06 in / 2.7 cm,Filter Slot Dimensions: 19.8 x 19.8 x 1.3 in / 50.3 x 50.3 x 3.2 cm,Item Model Number: 1RAF2020-1,Product Dimensions: 22.6 x 22.6 x 1.6 in / 57.5 x 57.5 x 4 cm,Net Weight: 5.51 lbs / 2.5 kg