As one of Oral-B’s premium replacement toothbrush heads, the CrossAction features precise angles that target plaque to remove up to 100 percent more plaque vs. a regular manual toothbrush. The shape of Oral-B CrossAction toothbrush head features specifically engineered bristles that are designed for optimal tooth coverage. The distinct bristles reach deep between teeth to remove plaque and leave your whole mouth cleaner than a regular manual toothbrush. Compatible with Oral-B Genius 8000, 9000. Compatible with Oral-B PRO 600, 650, 1000, 2000, 2500, 3000, 4000, 4900, 5000, 6000, 6500, 7000. Compatible with all Oral-B Vitality and Vitality Plus Variants. Each order comes with 4x Oral-B CrossAction Electric Replacement Toothbrush Heads.