The oral b pro cross action toothbrush head features more than 2200 perfectly angled bristles to remove up to 100% more bacterial plaque for cleaner teeth and healthier gums vs. A manual toothbrush. Oral b genuine brush heads are designed with new x shape bristles that clean in areas that round ones cannot reach. Its brush head usage indicator turns bristles from green to yellow showing you when to change for 100% cleaning efficacy. Guaranteed fit with oral b electric rechargeable toothbrushes except for pulsonic and io toothbrushes. Removes up to 100% more bacterial plaque for cleaner teeth and healthier gums vs. A manual toothbrush only genuine oral b brush heads feature x shape bristles that clean in areas that regular ones cannot reach for optimal cleaning efficacy oral b cross action features unique 16? Angled bristles to perfectly adapt to each tooth for deep cleaning guaranteed fit with oral b electric rechargeable toothbrushes except pulsonic and io toothbrushes brush head usage indicator bristles turn from green to yellow reminding you when to change to keep 100% cleaning efficacy.