1. Ultrasonic electric toothbrush can effectively remove plaque and reduce gingival necrosis. 2. The appearance of the 3D brush adapts to the of the teeth. The small and delicate brush head is easy to touch inside your mouth. 3. Adopt American tynex classic 0.152mm bristles, brush approved by and UV . 4. Vacuum packaging, safety standards. 5. This type is suitable for people who smoke or drink coffee. Suitable for X/ X PRO/ Z1/ F1/ One/ Air 2 /SE Electric toothbrushes. Colour:black+white+grey+pink Material: ABS Package Contents: 12 x toothbrush heads Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.