Avoid expensive repairs and protect your microphone housing against dirt and wax by using this T-Cap microphone filter from Oticon. To use this microphone filter, it is required that your hearing aids have a microphone housing that is adapted for a T-Cap microphone protection. This microphone filter is supplied in a pack of 8 and fits Oticon and Bernafon's in-ear devices. Oticon IIC Oticon CIC MIC devices to Oticon OPN series Oticon Siya series Oticon Alta series Oticon Ria series Oticon Nera series Oticon Agile CIC2 Oticon Agile MIC2 Bernafone Zerena in-ear Bernafone Juna in-ear Bernafone Saphira in-ear To replace a T-Cap filter: 1.Remove the tool from the shell. The tool has two arms, one with the new filter and one with the removal tool. 2.Push the removal tool into the existing wax filter and remove the used filter from the hearing aid. 3.Push the new filter into the hearing aid. 4.Discard the used tool.