12" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 16"] w32h32 thanks to counter-sunk screw holes

thanks to counter-sunk screw holes and included screws

Solid Base for Stability – Built with a solid base for reliable mounting and stability

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Actual Filter Size – 19 3/4"w x 33 3/4" x 1"

12" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 16"] w32h32 thanks to counter-sunk screw holes+ Product Details Size The listed 12" diameter refers specifically to the size of the duct opening. However, please note that the total outer dimensions of the grille measure 16" 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