Photo 1 of 12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 13.75 x...

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Photo 1 of 12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 13.75 x... Photo 2 of 12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 13.75 x... Photo 3 of 12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 13.75 x... Photo 4 of 12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille - Aluminum Rust Proof - HVAC Vent Duct Cover - White [Outer Dimensions: 13.75 x...