Photo 1 of 6" x 6" [Duct Opening] Aluminum Return Air Grille | Cube Core Rust Proof Eggcrate Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 7.75" X 7.75" for 6x6 Duct Vent 6"W x 6"H [Duct Opening]

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Photo 1 of 6" x 6" [Duct Opening] Aluminum Return Air Grille | Cube Core Rust Proof Eggcrate Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 7.75" X 7.75" for 6x6 Duct Vent 6"W x 6"H [Duct Opening]Photo 2 of 6" x 6" [Duct Opening] Aluminum Return Air Grille | Cube Core Rust Proof Eggcrate Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 7.75" X 7.75" for 6x6 Duct Vent 6"W x 6"H [Duct Opening]