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![Photo 1 of 20"W x 30"H [Duct Opening Measurements] Steel Return Air Grille | Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 21.75"W X 31.75"H for 20x30 Duct Opening Duct Opening Size: 20"x30"](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1018603187%2FBZD5Zmae3KVLRSH5AAI0I.jpg?alt=media&token=e64cc707-5b4a-4fec-a92c-e36279cd789e)
![Photo 1 of 20"W x 30"H [Duct Opening Measurements] Steel Return Air Grille | Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 21.75"W X 31.75"H for 20x30 Duct Opening Duct Opening Size: 20"x30"](https://m.media-amazon.com/images/I/81m0BjVI41L.jpg)