As one of Oral-B’s premium replacement toothbrush heads, the Cross Action 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 Clean Maximizer technology. Clean Maximizer 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. Oral-B’s best for whole mouth cleaning (excluding Oral-B iO), Up to 100% more plaque removal and healthier gums vs. a regular manual toothbrush, With Clean Maximizer technology that lets you know when it's time to swap refills by changing bristle colors, so you always get the best clean, Perfectly angled at 16 degrees to reach deep between teeth and sweep away plaque, Dentists recommend to change brush head every 3 months for the best clean, Compatible with all Oral-B handles except Pulsonic & iO, Number of toothbrush heads included in this pack: 2, Choose Oral-B, no.1 used by dentists worldwide.