HF wax filters
The HF3 and HF4 wax filters are used to have protection before the hearing, so we avoid the wax produced in the ears between them. These filters are used by Phonak, Siemens, ReSound, Rexton and Hansaton hearing aids.
The difference between the two types of filters is that the wax filter HF4 is smaller because it is 2.4 mm and HF3 wax filter is bigger as it measures 3.0 mm.
This wheel contains 15 filters.