The Philips Sonicare Optimal Gum Care brush head features a convex trim profile specifically designed to offer a gentle, even clean along the gum line. Compatible with all click-on Sonicare models, these replacement brush heads are proven to improve gum health up to 100% better than a manual toothbrush. Use with a Philips Sonicare Brush Sync compatible handle (DiamondClean Smart or ProtectiveClean) to unlock Smart features: Brush Sync mode-pairing triggers your handle to select optimal mode and intensity level for exceptional plaque removal (certain models only); Brush Sync replacement technology tracks how often and how hard you brush and will notify you when it is time to replace your brush head. Also, 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. Standard Optimal Gum Health brush heads, white, qty 3