Boots Expert Pro-Clean Sonic Replacement Brush Head (2 Pack)Helps break up plaqueEffective cleaning in hard to reach areasIndictor bristles fade with use to remind user to replace brush headHow to useRinse brush head before first use and rinse after each useBefore Initial use please ensure your toothbrush is free of toothpaste residue.Dentists recommend replacing brush head every 3 months fro optimal brushing performance. Replace sooner if brush head becomes loose due to damage.Compatible with the following Philips Sonicare power toothbrush handles:DiamondCleanFlexCare SeriesHealthyWhiteEasyClean5 Series3 Series2 SeriesCleanCare+Warning:Toothbrush: Not suitable for children 4 years old and under. Children under 8 should only use under the supervision of an adult.Brush head & cap: Not suitable for children under 36 months. Small parts. Choking hazard.