12" X 10" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 2-Way + Product Details Size -

+ Product Details Size - 30"w X 36"h is the size for the duct opening measurement only

Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow

and waste gases transmission lines

+ Product Details Size – 10"w X 30"h is the size for the duct opening measurement only

12" X 10" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 2-Way + Product Details Size -+ Product Details Size 12"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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