The philips sonicare 2-in-1 plaque removal whitening c3 brush head provides a superior deep clean and whiter teeth. Designed to work with all click-on sonicare models these replacement brush heads have flexing sides that contour to your teeth and gums for 4x more surface contact and our deepest clean. Its dense bristles work hard to remove everyday surface stains so you can experience whiter teeth in just 3 days*. Use with a philips sonicare brushsync tm compatible handle diamondclean smart or protectiveclean to unlock smart features: brushsync mode-pairing triggers your handle to select optimal mode and intensity level for exceptional plaque removal certain models only brushsync 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. We are working towards reducing the use of fossil-fuel based plastic in our products. That s why 70% of the plastic used in this brush head is bio-based.** *In white mode using a leading whitening toothpaste. **Allocated to plastic of brush head on mass balance basis. 4 Standard 2-in-1 plaque removal whitening c3 brush heads white Brand: Philips Sonicare Size: [4 Count (Pack of 1)]