14"w X 6"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 7.75"H] Color_R-4.2 Yellow Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 5 3/4" x 1"

+ Product Details Size – 20"w X 50"h is the size for the duct opening measurement only

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Actual Filter Size – 9 3/4"w x 11 3/4" x 1"

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

14"w X 6"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 7.75"H] Color_R-4.2 Yellow Actual Filter Size – 31+ Product Details Size 14"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" width X 7. 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