About this itemDesigned for easy self-replacement, our sound tubes are available in three sizes - medium being the kit default. Two same-side tubes per pack. The condition of your sound tubes is vital since they carry the amplified sound from the hearing aid into the ear canal. Ear tubes need to be replaced from time to time as the medical grade silicone material wears and becomes discolored, crimped, torn, clogged and/or brittle. Features