Review (5/5): Does what it claims!
The photo makes it seems as if the openings on each end are equal size, but one is slightly smaller than the other.
The measurements are given for accuracy and to save you aggravation and waste, so be sure to use them and measure your devices before ordering. I ordered it at the same time as my diffuser...
I bought this because I wanted to use the black orchid diffuser with my ancient Conair Ion Shine 1875, and I was worried it wouldn't fit. Turns out the opening to my dryer is so large the black orchid diffuser fits INTO the hair dryer opening -- all I have to do is press very firmly and it fits into place without popping out. I will use the snozzlepro for other dryer attachments now...
I thought about returning the snozzlepro, but then thought I should try popping it onto the end of my Revlon One Step, which I occasionally try to use on the cool setting. If you have a Revlon One Step, you know there are at least four major problems with it. One of them is that some of your hair gets caught in the rim underneath the upper cap/handhold as you turn it, and you either rip the hairs out of your head without realizing, or you have to stop and try to pry the hairs out. I thought the wide end of the snozzlepro might stretch to fit over that rim, to protect my hair from getting caught in it. (Turns out it's a little too small for that and keeps popping off, but the snozzlepro manufacturer was very sweet and tried to help me make it work, even though it is not intended for that purpose.) [In case you're curious about the other problems with the Revlon One Step -- the heat is too high, the bristles grab your hair to the point of causing breakage, and the sound is so loud you should use earplugs. I'm going to stop using it.]