PHONAK FILTERS FOR HEARING AIDS Waterproof and oil-resistant filters can prevent earwax or water from entering the interior, thereby prolonging the life of the hearing aid. Easy to install, providing ease of use for older or other groups, practical accessory. Prevent earwax dust and other foreign objects from blocking the horn. Extended the life of your hearing aid, including 8 pieces packed to meet your needs. Manufacture from high quality plastic for maximum durability. Article type: Hearing Aid Wax Covers Material: plastic; Hole diameter: Ok. 2 mm / 0,08 inch Suitable for hearing aid: For Oticon How to use: remove the old hearing aid wax covers with mesh, clean the bell inlet, use the other end of the mesh to lock the wax covers to the hearing aid, load the bell, gently check whether the wax is hard or not List of packages: 1 x Box of Wax Hearing Aid Covers (8-Pack)