1. Soft DuPont bristles, suitable for sensitive teeth to use 2. Ultrasonic electric toothbrush can effectively remove plaque and reduce gingival necrosis. 3. Adopt DuPont American tynex classic 0.152mm bristles.Soft bristles,gently to your teeth. 4.0.01mm bristle tip diameter, deep clean the space between teeth 5.Please replace the toothbrush heads every 3 months Compatible with models starting with for HX3/HX6/HX8/HX9/R for XH3 series: for HX3120 HX3130 HX3216 HX3226 HX3240 HX3250 HX3260 HX3631 for XH6 series: for HX6011 HX6013 HX6014 HX6021 HX6030 HX6053 HX6063 HX6064 HX6073 HX6100 HX6220 HX6212 HX6312 HX6411 HX6431 HX6500 HX6511 HX6512 HX6520 HX6530 HX6711 HX6712 HX6721 HX6730 HX6731 HX6732 HX6761 HX6780 HX6781 HX6782 HX6902 HX6910 HX6942 HX6950 HX6952 HX6982 for XH9 series: for HX9003 HX9013 HX9112 HX9141 HX9172 for HX9332 HX9340 HX9342 HX9350 for HX6912 HX6930 HX6932 HX6933 for HX9352 HX9362 HX9363 HX9182 for R series: R710 R732 R910 R930 R950 Colour:C:White Material:Plastic Package Contents: 10x Replacement brush heads Only the above package content, other products are not included. Note: Light reflection 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.