I installed the Headsets Inc version about 8 years ago in a set of Peltors.
I think they are great. The instructions were clear and it was fun to do.
I had no idea how loud cars are until I tried them on the way out to the airport for the first flight!
Anyway, I can vouch for the quality of mine, and I don't even work for them or anything!

__________________
Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is
nothing-absolute nothing-half so much worth doing as simply messing around with
Aeroplanes
(with apologies to Ratty)
2019