10" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 14"] 18" Round Duct Pipe actual front end outer dimensions

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

actual front end outer dimensions are approximately 36 5/8" width X 32 5/8" height

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10" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 14"] 18" Round Duct Pipe actual front end outer dimensions+ 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