High Compatibility Our replacement toothbrush heads are for Philips Sonicare ProtectiveClean, DiamondClean, DiamondClean Smart, DailyClean, EasyClean, ExpertClean, FlexCare+, FlexCare Platinum, HealthyWhite, HealthyWhite+, 2 Series Plaque Control, 3 Series Gum Health, PowerUp and most snap-on toothbrush. ProtectiveClean - HX6402 HX6411 HX6421 HX642..