HF4 or HF3 filters?

I know one is bigger than the other but how do you know which one fits your click earmold that has a mini receiver?

I wear Signia Pure Nx by Siemens.

Maybe you are asking about Siemens/Signia? It’s hard to tell?

Yes it’s Signia Pure Nx by Siemens. Sorry to be a pest.

Hmmmmm, Signia Pure Nx?

I can see where HF4 filters are mentioned for earlier models like on this Fitting Guide for Micron Binax Page 15. But when I look for the Nx model I don’t see any reference to HF4 fliters?

It’s a RIC hearing aid with a custom mold. I don’t have a in the ear unit.

I am guessing they would be the (HF4 wax screens 2.5mm in diameter) and not the (HF3 wax screens 3mm in diameter) because the Fitting Guide for Micron Binax Page 15 mentions HF4 wax screens.

So it wouldn’t make any sense for Signia to reverse that and start using the larger HF3’s.