PS:Suitable for SOOCAS X1/X3/X3U/X5 Features: 1. Soft DuPont bristles, well suited for sensitive tooth to use 2. Ultrasonic electric toothbrush can effectively get rid of plaque and reduce gingival necrosis. 3. Adopt DuPont American tynex basic 0 bristles bristles,gently for your teeth. four bristle tip diameter, deep clean the distance between teeth five authorized by way of FDA and UV sterilized. 6 sealed packing, much more safe to use. 7 sealed packing,With filth cap. Tips 1 buy according to the corresponding mannequin on the particulars page 2 customary brush head, field to the received merchandise