6" X 6" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 7.75"W X 7.75"H] Fixed Blades + Product Details Outer dimensions:

+ Product Details Outer dimensions: 21

+ Product Details Size – 28"w X 22"h is the size for the duct opening measurement only

+Why Hvac Premium HVAC Premium has been providing superior quality service for many years

The design eliminates noise and prevents louvers from vibrating

Easy Installation – Comes with all necessary installation screws for a quick and hassle-free setup

6" X 6" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 7.75"W X 7.75"H] Fixed Blades + Product Details Outer dimensions:+ Product Details Size 6"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are 7. 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