Oral-B Cross Action Black Edition Clean Maximiser Replacement Heads As one of Oral-B's leading 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. The uniquely designed bristles reach deep between teeth to remove plaque and leave the entire oral cavity cleaner than a simple manual toothbrush. Oral-B's improved CrossAction brush heads have been developed with CleanMaximiser technology that turns the green fibers yellow when it's time to change the brush head for optimal performance. Compatible with all Oral-B handles except Pulsonic & iO. Contents : 2 black Oral-B CrossAction replacement brush heads Features & benefits : Oral-B's best choice for cleaning the entire oral cavity (excluding Oral-B iO) It has ideal 16-degree angles to reach deep between teeth and remove plaque Up to 100% more plaque removal and healthier gums than a regular manual toothbrush With CleanMaximiser technology, the green bristles turn yellow when it's time to change the brush head Dentists recommend changing your brush head every 3 months for superior cleaning Compatible with all Oral-B handles except Pulsonic & iO From the No. 1 electric toothbrush brand recommended by dentists worldwide