6" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 7.75"H X 7.75"H] Adjustable Return Actual Filter Size – 19

Actual Filter Size – 19 3/4"w x 13 3/4" x 1"

This versatile diffuser is available in 1-way

875" width X 13

+ Product Details Size - 25"w X 4"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 17 3/4" x 1"

6" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 7.75"H X 7.75"H] Adjustable Return Actual Filter Size – 19+ Product Details Size 6"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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 Location