1. Electric toothbrush for Philips HX3/HX6/HX9 series
2. DuPont bristles, safe and durable, rounded
3. Copper-free hair planting, cleaner and more efficient
4. The diamond bristles are hard, the rest of the styles are standard bristles, soft or standard bristles can be used for sensitive teeth
5. Applicable people: daily cleaning people, sensitive first-time users, people with stains and yellow teeth