As one of Oral-B's leading brush heads, Crossaction features bristles angled at exactly 16 degrees and removes up to 100% more plaque than a regular manual toothbrush. Oral-B's improved Crossaction brush heads are built with CleanMaximiser technology that turns green bristles yellow for optimal performance. \ \ The uniquely designed bristles reach deep between teeth to remove plaque and leave your entire mouth cleaner than a regular manual toothbrush. \ \ \ features: \ \ \ \ oral-b's best choice for cleaning the entire oral cavity (excluding oral-b io) \ up to 100% more plaque removal and healthier gums than a regular manual toothbrush \ with cleanmaximiser technology, the green fibers turn yellow when it's time to change your electric toothbrush head \ has ideal 16-degree angles to reach deep between teeth and remove plaque \ \ \ compatible with all oral-b handles except pulsonic & io. \ \ instructions for use: \ \ dentists recommend changing your toothbrush head every 3 months. \ \ \