- Phonak recommends these original replacement parts from Hearing Aid Battery
- These HE Slim Tubes fit Ambria, Cassia and Solana open fit styles.
- Audiologists recommend changing these thin hearing aid tubes every 6 months.
- The size is printed on the tiny end so use a loupe and bright light so you can see it.
- Please review the Product Description before ordering if you need assistance with ordering the proper size HE Slim Tube