10"w X 8"h [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] rg1010 These tabs dig into the

These tabs dig into the main duct when you push the fitting in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening)

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

making installation straightforward and hassle-free

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10"w X 8"h [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] rg1010 These tabs dig into the+ Product Details Size 10"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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