This Review Title is Not 100% Universal and the content is: I just came back from a trip to Vietnam. I stayed in 5 different hotels, and this attachment only worked on 3 of the dryers in those hotels.  This diffuser attachment is great when it attaches to the dryer, but it is not truly universal..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.