1. For brands: Phonak, Resound, Widex, Unitron, Jungle Care, and more. You could get confirmation by click "Ask a question" in our Amazon's storefront page.
2. Quantity: We offer two options for each color - 5-pack (40 filters) & 10-pack (80 filters)
3. Easy to use: Just follow the picture guide or the description as below stated.
4. Function: to keep ear wax, dust, grease and moisture away from blocking the hearing aids.
5. Notice: If a medical condition exists, such as a perforated eardrum, or if an ointment is used, do not use the wax guard.
