What it is: A universal, on-piece adaptor that fits most hair dryers for soft, frizz-free curls. What it does: The innovative, hand-shaped DevaFuser delivers 360-degree airflow to completely surround curls while helping to enhance the appearance of natural curl, create extreme body, and deliver touchable volume. Ultralightweight for easy handling and styling, the ergonomic design features over 50 air vents that direct air to targeted curls and the cold-shot button locks curls into place. Great for all hair types especially curly hair, you can now custom style your strands with dual temperature and speed settings for a stunning look. What else you need to know: The universal, one-piece DevaFuser fits most commercially available hair dryers of the following size specifications: Barrel diameter: two inches to two and a half inches. Barrel circumference: five and a half inches to six and a half inches. Barrel length: two and a half inches to six and a half inches.