16" X 16" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] 1-Way [Outer Dimensions: 12

[Outer Dimensions: 12

+ Product Details Size - 8"w X 8"h X 2"d (for duct opening measurement only)

Adjustable airflow control - by rotating the middle disk

Experience enhanced indoor comfort with our 8" Radial Damper

Actual Filter Size – 9 3/4"w x 13 3/4" x 1"

16" X 16" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] 1-Way [Outer Dimensions: 12+ Product Details Size 16"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" width X 17. 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