16" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 7.75"H] 14" Round Duct Pipe with actual outer dimensions of

with actual outer dimensions of 14

actual front end outer dimensions are approximately 30 5/8" width X 38 5/8" height

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 11 3/4"w x 25 3/4" x 1"

16" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 7.75"H] 14" Round Duct Pipe with actual outer dimensions of+ Product Details Size 16"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" width X 7. 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