• Replacement heads designed exclusively for Oral-B iO electric toothbrush handles. • Combines powerful and gentle micro-vibrations with the dentist-inspired round head design. • Removes up to 100% more dental plaque than a conventional manual toothbrush along the gum line. • Bristles with a 16-degree angle for deep cleaning in hard-to-reach areas. • Filaments that change color to indicate when to replace the head. • It is recommended to replace the head every 3 months to maintain brushing effectiveness. • Black product made in Germany.