Review (5/5): Great diffuser
Bought this for my RUSK hair dryer - fits perfectly, and as tight as when I first put it on. Not sure why people have problems with it. It's a pretty straightforward process to attach this diffuser and it has remained solid with consistent use for 3 months. For me, it's too large to travel with but it's great for home use. Seems to be engineered and manufactured well. Highly recommend.