12" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 5.75"H] return grille 2 recessed screw holes on

2 recessed screw holes on each side with screws included

+ Product Details Outer dimensions: 13

actual front end outer dimensions are approximately 36 5/8" width X 30 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 25" OR 25" X 14" duct opening (measured at the opening)

12" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 5.75"H] return grille 2 recessed screw holes on+ Product Details Size 12"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 5. 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