8" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 12"] w10h10 Actual Filter Size – 19

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

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10” x 8” duct openings

Rigid Built For External Use– The sturdy and rigid design features noise free components that eliminates vibration and excess noise to the louvers

actual front end outer dimensions are approximately 22 5/8" width X 16 5/8" height

8" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 12"] w10h10 Actual Filter Size – 19+ Product Details Size The listed 8" diameter refers specifically to the size of the duct opening. However, please note that the total outer dimensions of the grille measure 12" 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