- Replacement heads designed for Oral B iO electric toothbrush series 2, 3, 4, 5, 6, 7, 8, 9, and 10 - Includes 8 units in black, perfect for family or extended use - Rounded and dense bristles allow for deep tooth-by-tooth cleaning and effectively remove plaque - Provide personalized care for daily cleaning, teeth whitening, and protection of sensitive gums - Easy installation: simply remove the old head and attach the new one - It is recommended to change the head every 3 months to maintain cleaning effectiveness - Ideal for those seeking advanced oral hygiene and complete care of teeth and gums