COMPATIBLE WITH THE FOLLOWING : DIAMONDCLEAN, FLEXCARE PLATINUM, EASY CLEAN, HEALTHYWHITE, FLEXCARE, HYDROCLEAN, FLEXCARE+ BRUSH HANDLES 2X Whitening - Pursonic's activated charcoal bristles provide a natural ultra whitening boost to your brushing sessions.Charcoal infused bristles makes your teeth squeaky clean & Extra White These Pursonic replacement brush heads are Compatible with Philips Sonicare Toothbrushes and are designed for cleaning all tooth surfaces & deep cleaning between your teeth IMPROVE ORAL HEALTH: our replacement brush heads are proven to improve overall Mouth and Gum Health