16" X 16" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] Compatible With Duct 6in actual front end outer dimensions

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

Multi Angled Fan Pattern Fins For Multi Directional AIr Distribution Throughout The Entire Room

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 10" duct openings

Actual Filter Size – 27 3/4"w x 5 3/4" x 1"

16" X 16" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] Compatible With Duct 6in actual front end outer dimensions+ 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