Ear wax is a killer for your Earasers. Protect the filter with these simple to use wax guards. Each pack contains 8 wax guards with a tool for insertion and removal. This will help keep your filters operating at peak condition. We suggest one filter every other week. If you use Earasers daily, and if you have more wax production than average, you may also want to increase the use of the wax guards to once per week.