14" X 8" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 9.75"H] Color_Anodized Aluminum and installation is quick and

and installation is quick and simple with the included screws

+ Product Details Size - 4"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 30 5/8" height

+ Product Details Size – 30"w X 18"h is the size for the duct opening measurement only

ISO Supply Diffusers perform efficiently with air loadings of 6 to 30 air changes per hour (based on 10 ft

14" X 8" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 9.75"H] Color_Anodized Aluminum and installation is quick and+ Product Details Size 14"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 15. 75" width X 9. 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