12"w X 12"h [Duct Opening] 3-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Compatible with Duct 8" + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening)

and the included installation screws make setup simple and efficient

actual front end outer dimensions are approximately 18

Crafted meticulously from high-quality steel

12"w X 12"h [Duct Opening] 3-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Compatible with Duct 8" + Product Details Perfect Fit+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 13. 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