usmile whitening brush head is compatible with all toothbrushes of usmile, including Y10 PRO, Y10, Y1S, P1, U3, etc.

Featured
1. First-tier Bristles: The bristles are of the best quality in the industry.
2. Premium Gum Care: Each filament is at least 90% round to protect your gums in brushing.
3. Fluoride-infused: The bristles release fluoride ions to strengthen the enamel of teeth.
4. Reminder Bristles: The color gradually fades to serve as a reminder for replacement, as recommended by the dentist.