Photo 1 of Ozo Brothers 4" x 4" Inch Black Vent Cover/Built-in Guard Screen - Square Air Return Grille/Plastic Vent Cover/Louvered Design/HVAC Ventilation Outer Dimensions: 6" x 6" Inch.

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Photo 1 of Ozo Brothers 4" x 4" Inch Black Vent Cover/Built-in Guard Screen - Square Air Return Grille/Plastic Vent Cover/Louvered Design/HVAC Ventilation Outer Dimensions: 6" x 6" Inch.Photo 2 of Ozo Brothers 4" x 4" Inch Black Vent Cover/Built-in Guard Screen - Square Air Return Grille/Plastic Vent Cover/Louvered Design/HVAC Ventilation Outer Dimensions: 6" x 6" Inch.