Regular Replacement: We recommend that you should change these earwax filters regularly as they can fill up with wax and/or other non-visible debris and block the sound from your hearing amplifier. Replace the earwax filter according to the circumstances after using every six months or one year. Portable Wax Filter: This ehearing aid cleaner with transparent case, you can use whenever you need. Hearing aid filters package comes with 4 boxes cerumen stop filters(tatol 32pcs), 7 hole brush, tube brush, ensure your hearing aid guard last long enough before changing out the filters. Wax Guards Fit Models: Hearing aid earwax guard is suitable for hearing aids and hearing amplifier, such as for Starkey, for for RIC, for CIC, for ITE and for ITC. Hearing aids & accessories. Protects Your Hearing Aids: This wax filter traps dirt, dust, and wax from entering the dome or ear mold. Hear clear wax guards effectively clean your hearing aids, so that the sound quality of your hearing aids can be improved to meet your daily needs. Wax Guard Filter Cleaning Kit: Are you worry about your hearing aid clogging? We recommend a cleaning tool hearing aid parts to you! Hearing aid supply can be used for a long time, help you extend the life of your hearing aid device.