As one of Oral-B’s premium replacement toothbrush heads, the CrossAction features perfectly angled bristles at 16 degrees that target plaque to remove up to 100% more plaque vs. a regular manual toothbrush. Oral-B’s improved CrossAction toothbrush heads are developed with CleanMaximiser technology. CleanMaximiser technology turns green bristles yellow when it is time to replace your brush head, so you always get the best clean. For optimal results, dentists recommend changing your brush head every 3 months. Compatible with all Oral-B handles except Pulsonic & iO.