24"W X 6"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 25.75"W X 7.75"H] 10" Diameter + Product Details Size -

+ Product Details Size - 24"w X 8"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 16" OR 16" X 18" duct opening (measured at the opening)

making it ideal for preventing tampering or unauthorized adjustments

8" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

while the included installation screws make setup quick and hassle-free

24"W X 6"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 25.75"W X 7.75"H] 10" Diameter + Product Details Size -+ Product Details Size 24"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are 25. 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