Replacement brush compatible with Oral B Trizone machines and with all Oral B rotary brushes. Deep cleans teeth and gums thanks to triple brushing action. Promotes cleaner teeth and healthier gums versus a regular manual toothbrush. Features triple zone cleaning with three bristle zones to deep clean in hard-to-reach areas. Helps you brush as you would with a manual toothbrush for easy handling. Indicator bristles fade as a sign to replace your toothbrush head for a better clean. Compatible with the entire lineup of Oral B electric toothbrushes, except for Oral B sonic toothbrushes. Oral B #1 brand used by dentists worldwide.