Keep your teeth fresh and healthy with these Oral B Cross Action brush refills. The bristles reach deep between your teeth to remove plaque better than a manual toothbrush can, and each head can reach every tooth. This pack of four Oral B Cross Action brush refills is compatible with most Oral B handles. Compatible with Oral-B rechargeable toothbrush handles For use with your existing model. Exception: Oral-B pulsonic toothbrushes. Multi-angled bristles in opposing directions The bristles set at a 16-degree angle reach deep between teeth. CrissCross technology CrissCross bristles remove 300% more plaque along the gum line. Professionally inspired design The round brush head provides tooth-by-tooth cleaning. Replace brush heads every 3 months Oral-B brush head refills feature indicator bristles that fade halfway to help remind you when to replace your toothbrush head so you maintain a superior clean vs. a regular manual toothbrush.