PS:Replacement for Apiyoo SXP Red 1. Soft DuPont bristles, well suited for touchy enamel to use 2. Ultrasonic electrical toothbrush can effectively remove plaque and reduce gingival necrosis. 3. Adopt DuPont American tynex basic 0 bristles bristles,gently in your teeth. 4 bristle tip diameter, deep clear the gap between enamel 5 approved through method of FDA and UV sterilized. 6 sealed packing, much more safe to use. 7 update the toothbrush heads every single 3 months 8 you have any questions about the toothbrush model, you possibly can consult visitor service. Thank you.