Photo 1 of *MISSING PARTS UNKNOWN* Therwen 4 Pieces 10 Inch Round Vent Cover, Ceiling Diffuser HVAC Vent Duct Cover Replacement with Screws to Install, Fitting in 10 Inch Duct, Outer Dimensions: 13-15/16"

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Photo 1 of *MISSING PARTS UNKNOWN* Therwen 4 Pieces 10 Inch Round Vent Cover, Ceiling Diffuser HVAC Vent Duct Cover Replacement with Screws to Install, Fitting in 10 Inch Duct, Outer Dimensions: 13-15/16"Photo 2 of *MISSING PARTS UNKNOWN* Therwen 4 Pieces 10 Inch Round Vent Cover, Ceiling Diffuser HVAC Vent Duct Cover Replacement with Screws to Install, Fitting in 10 Inch Duct, Outer Dimensions: 13-15/16"