10" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 5.75"H] 6" Diameter 10"w X 4"h Is The

10"w X 4"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size - 26"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

both individually adjustable

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10" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 5.75"H] 6" Diameter 10"w X 4"h Is The+ Product Details Size 10"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 5. 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