The Philips Sonicare Gum Health brush head is designed to work with multiple Philips Sonicare snap-on handles. These replacement brush heads improves gum health up to 100% vs. a manual toothbrush. Reminder bristles fade to let you know when its 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.