GN Resound / Jabra Wax Filters, Linx, Quattro, Key, One, Omnia, Enhance.
Fits most CIC, ITC, ITE, and RIC (RITE or RIE) hearing aids from Phonak, Unitron, and Widex, plus select models from Resound, Beltone, and Oticon. Not compatible with Signia or Starkey hearing aids.