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![Photo 1 of 20" x 20" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 21.75 X 21.75]](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1020539787%2FeX2fmO9BldQR70kIqS9yN.jpg?alt=media&token=d0098a6c-db25-44e8-ae48-eca23ff53012)