Applicable Series: The link rod parts for Philips HX6300 / HX6500 / HX6700 / HX6900 / HX8900 / HX9100 / HX9300 series electric toothbrush. Applicable Models: The electric toothbrush metal shaft / vibrating tip replacement parts compatible with Philips HX6210, HX6710, HX6720, HX6730, HX6750, HX6760, HX6910, HX6920, HX6930, HX6950, HX6960, HX6970, HX6310, HX6320, HX6511, HX6340, HX6530, HX8910, HX9140, HX9150, HX9160, HX9340, HX9350, HX9360, HX9370. Essential Replacement Parts: How do I know if I need to replace the metal shaft part for my toothbrush? The metal shaft (vibrating tip) is covered by a rubber seal. In most cases, if this part comes out easily from the base, or when you feel weak vibration while brushing your teeth, or the brush head seems loose and cannot rotate properly, then you might need to replace the metal shaft connector block. Universal Link Rod Parts: The replacement metal shaft link rod parts are generally interchangeable. For example, if this part is compatible with the HX6910, it should fit all HX6900 series models such as the HX6920, HX6930, HX6950, HX6960, HX6970, and so on. The accurate HX number is marked on the bottom of your toothbrush handle. Note: Due to different batches, the appearance and label text may be slightly different, but it will not affect the use. Color: As shown Material: Metal + Plastic Package Contents: 2 x Electric Toothbrush Link Rod Parts 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.