Remove up to 1000% more plaque than a manual toothbrush: experience deep cleaning with a soft-touch brush head back that enhances the bristle motion for increased coverage and more thorough cleaning Achieve up to 100% more stain removal in 3 days²: the deep clean electric toothbrush heads use a cluster of dense bristles in pentagonal shape at their center to whiten and polish your teeth Proven Sonicare technology cleans gently yet effectively with up to 62,000 bristle movements; Sonicare Fluid Action supports cleaning by driving fluid deep between teeth and along the gumline BrushSync replacement reminder tracks how often and how hard you brush; the light on the handle will turn on when it's time to replace your brush head, blue bristles will also turn white These sonic toothbrush replacement heads are compatible with all Philips Sonicare click-on electric toothbrushes⁵: simply click one on or off for easy replacement and cleaning Philips aims to reduce the use of fossil fuel-based plastic, that's why 70% of the plastic in these sonic toothbrush replacement heads is bio-based; paper-based recyclable packaging The set includes: 2x C3 Two-in-one brush heads, black