it's designed for a mono light or speedlight..... it has an elastic band that clings to the light source...See Westcott's website for info.
this is a bit different than the current cheaper version..... this model (version) is a double-ribbed version a heavy-duty version... great for when you need to go to locations.
will meet locally, retired, and cleaning out my hobby closets... please see other items on my Craigslist listings..
I have more items not listed.... ask if you're looking for anything special