8"W X 6"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 9.75"W X 7.75"H] 8in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 11

+ Product Description Maximize HVAC efficiency with our aluminum eggcrate return air filter grille

40"w X 16"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size - 30"w X 18"h X 2"d (for duct opening measurement only)

the actual front end outer dimensions are 6" in diameter

8"W X 6"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 9.75"W X 7.75"H] 8in diameter actual front end outer dimensions+ Product Details Size 8"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are 9. 75" width X 7. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a