this review title is: not universal and the content is: would live to say that this was the best hair dryer diffuser i have ever used the problem the universal diffuser would not fit either of my blow dryers which are your basic brands and sizes the diffuser must be used with a dryer that is either narrow or tapered it appears to be a quality product but does not meet my needs and is destined for the charity bin.there are other information for this review, one is this reviewer did not purchase it and the other is 1 people think this review is helpful.