As one of Oral-B's top replacement brush heads, CrossAction features bristles angled at exactly 16 degrees and fights plaque, removing up to 100% more plaque than a regular manual toothbrush. Oral-B's improved CrossAction Brush Heads are developed with CleanMaximiser technology that turns green bristles yellow for optimal performance. The uniquely designed bristles reach deep between the teeth to remove plaque and leave the entire oral cavity cleaner than a simple manual toothbrush. Compatible with all Oral-B handles except Pulsonic & iO.