just buy the sturdy more expensive one [SEP] first i had to force it on to me dryer and actually cut off a section of tje grip on the inside but once it was on it worked great for a while hair stayed voluminous all day and still dried thoroughly and it didnt take a lot of effort to get that fluffbut after a couple months the face of the diffuser popped off and i thought i will just glue it back on but everything i tried it just would not stay ononly got a couple months use out of it and i have had my blow dryer for years i expect things like that to last amd be an investment now here i am back on look i g dor a diffuser just buy the sturdy more expensive oneit will be the greater investment in the long run