HF4 wax filters are commonly used with a range of receiver-in-canal (RIC) and in-the-ear (ITE) hearing aids from brands such as Phonak, Unitron, and other models that utilise the HF3 filter system. If you are unsure whether these filters are suitable for your hearing aids, we recommend checking your user manual or confirming with your audiologist before purchasing. Brand: GN Resound Compatibility: Primarily used on custom moulds, In-The-Ear (ITE), In-The-Canal (ITC), and older RIC models. Includes: Each pack typically contains multiple HF4 wax filters pre-loaded on easy-to-use applicator sticks, allowing for quick and hygienic replacement.