For Xiaomi SOOCAS X3 X5 X3U X1 V1 V2 SOOCARE Electric Toothbrush Heads Foodgrade Bristle Replacement Tooth Brush Head Nozzles with Anti-dust Cap Product Introduction: 1 substitute brush head is manufactured from yunchi Brand ,it is Compatible with SOOCARE X1 X3 X3U X5 sonic electric toothbrush. 2. Every brush head is sterilized by way of UV mild before packing. Each equipment is independently sealed, with anti-dust cover. three Dupont bristle , very easily deep cleaning tooth.