![Amazon.com: 16"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 17.75"w X 11.75"h] Amazon.com: 16"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 17.75"w X 11.75"h]](https://m.media-amazon.com/images/I/71pIIdOvVvL._AC_SX355_.jpg)
Amazon.com: 16"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 17.75"w X 11.75"h]
Return Air Grille for and 18" x 18" opening. 21" x 21" overall size. Square design. Black finish. - Majestic Vent Covers
PRICE Lay-In Mount Return Air Grille: 22 in Max. Duct Ht (In.), 22 in Max. Duct Wd (In.), White - 46V226|530 - Grainger
![26"w X 12"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 27.75"w X 13.75"h] - - Amazon.com 26"w X 12"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 27.75"w X 13.75"h] - - Amazon.com](https://m.media-amazon.com/images/I/71vUH-naG3L._AC_SX355_.jpg)
26"w X 12"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 27.75"w X 13.75"h] - - Amazon.com
![24" X 24 Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 25.75 X 25.75] - Heating Vents - Amazon.com 24" X 24 Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 25.75 X 25.75] - Heating Vents - Amazon.com](https://m.media-amazon.com/images/I/81Z2Q5d+35L._AC_SY355_.jpg)
24" X 24 Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 25.75 X 25.75] - Heating Vents - Amazon.com
![20"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 21.75"w X 11.75"h] - - Amazon.com 20"w X 10"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 21.75"w X 11.75"h] - - Amazon.com](https://m.media-amazon.com/images/I/71oLcfpMevL._AC_SX355_.jpg)