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![Photo 1 of 18"W x 18"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 19.75"H for 18x18 Duct Opening 18"W x 18"H [Duct Opening]](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1015995162%2Foi66p0zg7OW6oCt9zE2fS.jpg?alt=media&token=1f0780ea-0b3a-473f-b5d2-79bc94658038)
![Photo 1 of 18"W x 18"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 19.75"H for 18x18 Duct Opening 18"W x 18"H [Duct Opening]](https://m.media-amazon.com/images/I/91BhV4rU0lL.jpg)
![Photo 3 of 18"W x 18"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 19.75"H for 18x18 Duct Opening 18"W x 18"H [Duct Opening]](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1015995162%2Fvk7uGifFqhCDM3Rq48z43.jpg?alt=media&token=444587c8-7675-427b-a395-cc3a62067d89)