Applicable Brands: With nanometer coating protection, oil and water resnce. Suitable for Phonak hearing aid, easy to install, important and necessary accessory. Prevent Earwax Accumulation: Ear wax filter can prevent earwax from accumulating on the sound port of the receiver and improve the durability and reliability of the hearing aid. Hearing aid protection: The hearing aid earwax filter can prevent earwax, dust, grease and moisture from entering or blocking the hearing aid, protecting the movement of the hearing aid, and is practical and practical. Hear Aid Protection: Prevent earwax, dust, grease and moisture from entering or blocking the hearing aid, and protect the movement, practical for use. HEARING AID WAX GUARDS: Waterproof and oilproof filter prevents earwax, dust and other foreign matter from clogging the horn. Effective extending the service life of the listening device, keep the good and normal condition of the hearing aids horn.