6" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [White] - [Total Outer Dimensions: 10"] Aluminum Bar accordion-header')

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the actual front end outer dimensions are 10" in diameter

+ Product Details Size - 16"w X 20"h is the size for the duct opening measurement only

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Full Control – Full 190 degrees control of air direction vertically & horizontally

6" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [White] - [Total Outer Dimensions: 10"] Aluminum Bar accordion-header')+ Product Details Size The listed 6" diameter refers specifically to the size of the duct opening. However, please note that the total outer dimensions of the grille measure 10" 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