- Phonak recommends these, their original replacement parts brought to you from Hearing Aid Battery Club
- These tubes fit Certena, Excelia, Savia, Versata, and Naida Open Fit Hearing Aids.
- Audiologists recommend changing these hearing aid tubes every 6 months.
- The size is printed on the tiny end; we recommend using a loupe and bright light to determine the correct type and size.
- Please review the Product Description before ordering, and contact us if you need assistance with ordering the proper size Slim Tube.