12"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 9.75"H] 10in diameter Versatile Compatibility: Our ceiling grills

Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings

+ Product Details Size - 24"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 22"h is the size for the duct opening measurement only

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+ Product Details Size - 22"w X 32"h is the size for the duct opening measurement only

12"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 9.75"H] 10in diameter Versatile Compatibility: Our ceiling grills+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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