Universal 2-Way Diffuser for Hair Dryers, Fits 40-52mm Diameter. - Brand: ALPHA TOOL - Model Name: Universal 2 Way Diffuser - Compatible Size: 40-52mm - Application: Hair dryer diffuser - Features: Flat surface for styling I found this at home for some reason, but I'm not going to use it, so I'm selling it. I think it may or may not suit everyone, so please purchase only if you understand. There are no instructions included. If you are concerned about details, please refrain from purchasing. Please read my profile, thank you. Thank you for looking.