Photo 1 of Fits 12 Inch Neck Air Duct | Steel Round Air Supply Diffuser for Ceiling by Handua | Round Diffuser Vent Cover | White | Outer Dimension: 15-15/16"

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Photo 1 of Fits 12 Inch Neck Air Duct | Steel Round Air Supply Diffuser for Ceiling by Handua | Round Diffuser Vent Cover | White | Outer Dimension: 15-15/16"Photo 2 of Fits 12 Inch Neck Air Duct | Steel Round Air Supply Diffuser for Ceiling by Handua | Round Diffuser Vent Cover | White | Outer Dimension: 15-15/16"