For Philips Electric Toothbrush Waterproof Sealing PartsSuitable for the recent 18 type electric toothbrush connecting rod partsCompatible model: HX63xx series: HX6310 HX6311 HX6320 HX6330 HX6340 and so forth series:HX6530 HX6511 and so on series: HX6710 HX6711 HX6720 HX6730 HX6750 HX6760 HX6761 and so forth series:HX6910 HX6920 HX6930 HX6950 HX6960 HX6970 HX6972 and so on series: HX9112 HX9172 HX9140 HX9150 and so forth series:HX9322 HX9332 HX9340 HX9342 HX9352 HX9362,HX9360 HX9350 HX9360 HX9370 and many others series: HX9924/HX992P/HX9360/HX939/HX9901 ectFunction:Regular substitute of water-resistant seal can protect the electrical toothbrush from injury and delay its carrier life, and maintain your oral healthPackage included :1 pcs water resistant ring