10" X 8" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 9.75"H] w18h18 75" width X 31

75" width X 31

+ Product Details Size - 6"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 24 5/8" height

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

360-Degree Airflow: Experience optimal air circulation like never before

10" X 8" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 9.75"H] w18h18 75" width X 31+ Product Details Size 10"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 11. 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