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![Photo 1 of 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct Opening](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1012501005%2FspQZ8Dw3-BnKi3jwa8W1-.jpg?alt=media&token=963af681-dd7f-4913-ab74-8f337e2e6722)
![Photo 1 of 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct Opening](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1012501005%2FK6L_y3epuM1adz5p2a_gV.jpg?alt=media&token=c54d4ef4-4486-4310-af52-0bcf9b022228)
![Photo 3 of 18"W x 12"H [Duct Opening Size] Steel Return Air Grille (AGC Series) Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 19.75"W X 13.75"H for 18x12 Duct Opening](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1012501005%2FOPfoswN1iKh4Tt7o3Lg7z.jpg?alt=media&token=7afeb770-4491-4bb1-9b20-3107700dc199)