Avoid expensive repairs and protect your microphone housing against dirt and wax by using this O-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 an O-Cap microphone protection. This microphone filter is supplied in a pack of 8 and fits Oticon and Bernafon's in-ear devices. Oticon OPN ITC Oticon OPN ITE Oticon Siya ITC Oticon Siya ITE Oticon Alta ITC Oticon Alta ITE Oticon Alta2 ITC Oticon Alta2 ITE Oticon Acto ITC Oticon Acto ITE Oticon Ria ITC Oticon Ria ITE Oticon Ria2 ITC Oticon Ria2 ITE Oticon Nera ITE Oticon Nera ITC Oticon Nera2 ITE Oticon Nera2 ITC Oticon Ino ITE Oticon Ino ITC To replace an O-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.