- Replacement heads designed for Oral B IO electric toothbrushes series 2, 3, 4, 5, 6, 7, 8, 9, and 10 - Includes 10 units in black and white colors, perfect for family or extended use - Rounded and dense bristles that clean tooth by tooth and effectively remove plaque - Provide a comfortable cleaning experience, helping with teeth whitening and gum care - Easy installation: just remove the old head and place the new one - It is recommended to replace the head every 3 months to maintain oral hygiene - Fully compatible with Oral B IO, ideal for those seeking deep cleaning and gum protection