10"w X 10"h [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] 2-Way Actual Filter Size – 31

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

+ Product Details Size – 16"w X 6"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 17 3/4" x 1"

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

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10"w X 10"h [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] 2-Way Actual Filter Size – 31+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 11. 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