8x Cerumen Filter Hearing Aid For Phonak Resound Hearing Aid Accessories NEW Feature: It can prevent earwax or water from staying inside, thus prolonging the service life of the hearing aid. Made of high quality plastic materials, it can ensure long-term durability. Easy to install and ensure the elderly or other groups can use it comfortably. It is waterproof and oil-proof, wear-resistant and durable, not easy to damage.5. Suitable for Phonak and Resound hearing aids, it is a practical hearing aid accessory. Specification: Item Type: Hearing Aid Protector Material: Plastic Bore Diameter: Approx. 1.2mm/0.05in Suitable for Hearing Aids: Fit for Phonak, Fit for ReSound Instructions:Use a mesh remover to take out the old ear protector filter, clean the bell mouth, use the other end of the mesh remover to clamp the ear protector filter, install it into the bell mouth, gently test whether it is tight or not loose. Package List: 1 Box of Hearing Aid Guard (8Pcs) Note: Clean the ear protector filter with a small brush. Replace the ear protector filter once every six months to one year according to the condition of the earwax. After installing the ear protector filter, make sure to install it firmly to avoid falling into the ear canal.