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] 18" Round Duct Pipe if your hole is 20"

if your hole is 20" wide by 14" tall

Elevate your living space with this sophisticated addition

+ Product Details Size - 25"w X 16"h is the size for the duct opening measurement only

+ Product Spec Sheet Lay-In 3 Coned Spec Sheet

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] 18" Round Duct Pipe if your hole is 20"+ 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