10" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 14"] 18" Round Duct Pipe By means of the smooth

By means of the smooth surface

actual front end outer dimensions are approximately 12 5/8" width X 16 5/8" height

They seamlessly integrate into sheet rock plaster frame ceilings as well

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modern Victorian

10" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 14"] 18" Round Duct Pipe By means of the smooth+ Product Details Size The listed 10" diameter refers specifically to the size of the duct opening. However, please note that the total outer dimensions of the grille measure 14" in diameter. Design Heavier gauge than needed, built for durability and long life in mind, but still light and handy. (Screws included). Airflow Easy unrestricted airflow for your HVAC system. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was