The Philips Sonicare Plaque Control brush head is designed to work with multiple Sonicare models. These snap-on replacement brush heads gently remove 6x more plaque than a manual toothbrush. Reminder bristles fade to let you know when it's time for replacement. Replace your brush head every 3 months as recommended by the American Dental Association. A fresh brush head every 3 months maximizes the effectiveness of Philips’ unique Sonicare technology.