12 counts of Oral-B Pro Cross Action Black toothbrush head in a mailbox compatible packaging(packaging may vary) 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 & iO toothbrushes Brush head usage indicator: bristles turn from green to yellow reminding you when to change to keep 100% cleaning efficacy