Universal diffuser for hair dryer in black color, compatible with Bio Ionic Ultralight 10X, PowerLight Pro and Gold Pro hair dryers. Its dial helps to adjust the air flow according to the hairstyle and hair needs. Thus, with all vents open, a higher airflow will come out, while closing some vents will lower the airflow and facilitate more specific looks. Its long fingers allow you to reach the scalp, making it easier to dry from the roots and create volume.