These Oral-B Cross Action Black replacement brush heads are designed for superior cleaning performance with your electric toothbrush. The unique CrossAction brush head features crisscross bristles angled at 16 degrees, designed to reach deep between teeth and remove up to 100% more plaque than a regular manual toothbrush. Ideal for daily oral care, these heads ensure a comprehensive clean that supports gum health and brightens smiles. Replace your brush head every three months for optimal results.