duke6903 years ago+110Do these heads also fit on the Philips Sonicare ProtectiveClean 5100? I need soft ones, the brush attachment that comes with it is just too hard.Show in original language (German)Stardustone3 years ago011Yes, they fit on the ProtectiveClean, but these heads are not very gentle. These would be much gentler, they simply reinogen just as well, much gentler.Philips Sonicare S SensitivePhilips Sonicare Sonicare Sensitive (12 x)Show in original language (German)Comment