These are replacement brush heads designed for the Oral-B iO series electric toothbrushes. The Ultimate Clean brush head is engineered to provide superior cleaning performance, reaching deep between teeth and along the gumline for a professional-level clean feel. Featuring an innovative design, these heads oscillate, rotate, and use micro-vibrations to dislodge plaque effectively. They are ideal for daily use to maintain optimal oral hygiene and are essential for preserving the high performance of your electric toothbrush unit.