These wax guards can only be used on hearing aids fitted with this particular system, which is mainly Signia (Siemens) in-the-ear hearing aids.
The pack contains 10 wax filters, and a tool to help remove the existing wax guard and fit the new one in place.
The natural build up of ear wax can affect optimum functioning of your hearing aids. Wax filters on all in-the-ear hearing aids should be checked before every insertion, and the wax filter changed when necessary.