The Oral-B iO Radiant White brush head combines a dentist-inspired round brush with polishing elements to gently remove surface discoloration for whiter teeth from day one - For whiter teeth from day 1 by gently polishing away surface discoloration - Oral-B iO Radiant White combines perfectly angled bristles with polishing petals for advanced cleaning and whiter teeth - IO technology combines Oral-B's iconic round brush heads with the iO toothbrush's gentle micro-vibrations for Oral-B's best cleaning performance - Oral-B iO brush heads are exclusively designed to fit Oral-B iO toothbrushes - Dentists recommend replacing the brush head every three months for best cleaning effect - Oral-B is the brand used by most dentists worldwide. Clinically proven results Number of brush heads in this pack: 4