Oral-B Cross Action White Replacement Electric Toothbrush Heads Original Oral-B brush heads are designed with new X-shaped bristles that clean in areas that round bristles cant reach. The brush head usage indicator changes the bristles from green to yellow, reminding you when to change them to maintain 100% cleaning effectiveness. Guaranteed to fit all Oral-B rechargeable electric toothbrushes except Pulsonic & IO toothbrushes. easy delivery: 10 pieces, oral-b cross action black brush head in a mailbox-friendly package removes up to 100% more bacterial plaque for cleaner teeth and healthier gums compared to a regular manual toothbrush only genuine oral-b brush heads feature x-shaped bristles that clean in areas that regular ones cant reach for optimal cleaning efficiency oral-b cross action features unique 16° angled bristles for a perfect fit to each tooth for a deep clean guaranteed to fit all oral-b rechargeable toothbrushes except pulsonic & io toothbrushes brush head usage indicator: bristles change from green to yellow, reminding you when to change them to maintain 100% cleaning efficiency oral-b is the leading electric toothbrush brand used by dentists worldwide with clinically proven results