Applicable Models: HX6300 HX6500 HX6700 HX6900 HX8900 HX9100 and HX9300 series. The replacement link rod parts are generally interchangeable. For example, if this parts compatible with the HX9340 it should fit all HX9300 series models such as the HX9350, HX9360, HX9370 and so on How do I know if I need to replace the metal shaft part for my toothbrush? The metal shaft is covered by rubber seal. In most cases, if this part comes out easily from the base or when you feel the bad vibration while brushing your teeth, or your brush-head seems loosen and can't rotate properly, then you might need to replace the metal shaft connector block Installation: We provide instructions tutorial videos, please follow the steps to complete the installation Model Confirm Guide: If you are doubt about whether this vibrating tip is compatible with your toothbrush, accurate HX number is marked on the bottom of your toothbrush handle Package Included: 1 Piece vibrating tip, 1 set of sealing ring Applicable models:

HX63 series：HX6310/HX6320/HX6340/HX6321
HX65 series： HX6511/HX6530
HX67 series：HX6710/HX6720/HX6730/HX6750/HX6760/HX6770/HX6731
HX69 series：HX6910/HX6920/HX6930/HX6950/HX6960/HX6970/HX6980/HX6962/HX6921
HX89 series：HX8910/HX8920/HX8930/HX8911
HX91 series：HX9120/HX9140/HX9150/HX9160
HX93 series：HX9340/HX9350/HX9360/HX9370/HX939B/HX938B
HX939P/HX939B/HX939V/HX9331/HX9362/HX9372/HX9352/HX9392


except the following series:

HX62 series：HX6210/HX6240/HX6250
HX3 series：HX3226/HX3216

HX number is marked on the bottom of your toothbrush handle.