Cerustop Wax Guards provide effective protection for hearing aids against earwax accumulation. These small, disposable filters prevent wax from entering the device, ensuring optimal performance and longevity. Easy to replace and compatible with various hearing aid brands, Cerustop Wax Guards offer convenience and peace of mind for users. Compatibility:Cerustop Wax Guards are compatible with most Phonak, Unitron, Widex and GN ReSound hearing aids.**Please note – once these have been opened, they are non-refundable due to hygiene reasons.**