Oral B Precision Clean Refill x2 it has FlexiSoft filaments that eliminate bacterial plaque and clean in depth between the teeth and under the gingival sulcus, deeper than a manual brush. The brush head design was inspired by the superior cleaning power of professional dental tools. The shape allows the bristles to wrap around each tooth for individual cleaning.
Concave ends designed to remove plaque and massage along the gum line.
Replacement heads feature fading Indicator bristles to help remind you to replace the head to maintain superior cleaning compared to a standard manual toothbrush, and are compatible with all Oral-B electric toothbrush handles except the Oral-B Pulsonic.
You should replace the head every 3 months or sooner if it is visibly worn.