PS:Suitable for SOOCAS X1/X3/X3U/X5 Features: 1. Soft DuPont bristles, compatible for touchy enamel to apply 2. Ultrasonic electric toothbrush can effectively remove plaque and decrease gingival necrosis. 3. Adopt DuPont American tynex basic zero bristles bristles,gently to your teeth. four bristle tip diameter, deep clean the space between teeth 5 accepted by way of FDA and UV sterilized. 6 sealed packing, way more secure to use. 7 replace the toothbrush heads every single three months 8 you've got any questions about the toothbrush model, you might search the recommendation of guest service. Thank you. Indenpently sealed packing