Function: 1. It can prevent earwax or water from remaining inside, thus prolonging the life of your hearing aid. 2. Made of high-quality plastics, it ensures long-term durability. 3. Easy to install, so older or other groups can use it conveniently. 4. It is waterproof and oilproof, 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 Cover Material: plastic; Hole Diameter: Approx. 1.2 mm / 0.05 inch Hearing aid suitable: suitable for Phonak, suitable for ReSound Instructions: Use the mesh remover to take out the old earwax filter, clean the mouth of the bell, use the other end of the mesh remover to tighten the earwax filter, install it in the mouth of the bell, gently check it hard or not loose Package List: 1 box of hearing aid cover (8pcs) Note: 1. Use a small brush to clean the earwax filter. 2. Replace the wax filter every six months to a year, depending on the condition of the wax. 3. After installing the wax filter, put it on firmly to avoid falling into the ear canal.