12" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [White] - [Total Outer Dimensions: 16"] 10" Diameter powder-coated surface is scratch-resistant

powder-coated surface is scratch-resistant

75"H – fits a 18" X 18" duct opening

actual front end outer dimensions are approximately 30 5/8" width X 24 5/8" height

Installation – Easy drop ceiling installation

this grille offers a seamless blend of functionality and aesthetics

12" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [White] - [Total Outer Dimensions: 16"] 10" Diameter powder-coated surface is scratch-resistant+ 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