This set includes eight replacement brush heads designed specifically for Oral-B Cross Action electric toothbrushes. These parts are essential for maintaining optimal cleaning performance. Featuring Cross Action bristles angled at 16 degrees, these replacement heads are engineered to reach deep between teeth and along the gumline, effectively removing up to 100% more plaque compared to a manual toothbrush. Regular replacement ensures that the specialized bristle design remains effective for superior oral hygiene and gum health.