6" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 10"] Material_Steel These are specially sized to

These are specially sized to fit into all drop ceilings

With a 8" diameter for the duct opening measurement

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

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+ Product Details Size – 16"w X 10"h is the size for the duct opening measurement only

6" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 10"] Material_Steel These are specially sized to+ 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