8" X 8" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] 10" Diameter you can attain the diameter

you can attain the diameter of the vent

For 6" Round Duct Opening - Spiral or Flex

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+ Product Details Size – 34"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 25 3/4" x 1"

8" X 8" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] 10" Diameter you can attain the diameter+ Product Details Size 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 9. 75" height. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Equipped with a lever for easy airflow adjustment and dampening. Airflow Control Adjustable airflow lever allows precise control over the direction and volume of air. Installation Location