10" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover [Outer Dimensions: 12"] 12" Round Duct Pipe + Product Details Size –

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

Its heavier gauge construction guarantees durability and longevity

actual front end outer dimensions are 26

75"H – fits a 20" X 20" duct opening

+ Product Details Heavy-Duty Steel Construction - Made from 20-gauge steel for superior strength and durability

10" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover [Outer Dimensions: 12"] 12" Round Duct Pipe + Product Details Size –10" Diameter Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 10" Diameter Incorporated with Integral Butterfly Damper for full Airflow Control Assembeled Before Powder Coat Paint, to Ensure Perfect Smooth Finish Commercial Grade Aluminum Will Never Rust Designed for Warehouses, Factories, Workshops, Gymnasiums & Restaurants Center Core is Removable for Easy Access and Maintence 10" Circular Round Aluminum HVAC