Remove up to 2000% more plaque than a manual toothbrush and experience the best of Philips Sonicare: electric toothbrush heads providing effective whitening, plaque removal plus better gum health This brush head with multi-angle bristles keeps plaque removal on course no matter your technique; the All-in-One brush head delivers range-leading cleaning, even in hard-to-reach areas Achieve up to 100% more stain removal in 2 days²: the All-in-One brush head includes triangular bristles to increase surface contact and clean away stains more effectively Get up to 1500% healthier gums in six weeks¹: the side bristles of this brush head are extra-long to keep your gum line brushed even while you're focusing on 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 reminder⁵ 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 toothbrushes⁷: 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-based³; paper-based recyclable packaging⁴ The set includes: 2x A3 All-in-One brush heads, black Our genuine brush heads lasts up to 20%* longer than private label brands. *Average based on in-house lab test conducted over 60 uses of Sonicare (C1, C2, W2, S1, A3) vs 7 private label brands on Sonicare handles.