8" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover [Outer Dimensions: 10"] 12in diameter provide precise damper control and

provide precise damper control and superior air dispersion

75" Width X 31

Actual Filter Size – 33 3/4"w x 27 3/4" x 1"

+ Product Details Size – 16"w X 8"h is the size for the duct opening measurement only

8" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover [Outer Dimensions: 10"] 12in diameter provide precise damper control and8" Diameter Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 8" 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 8" Circular Round Aluminum HVAC