16 Degree angle cleans deep between teeth. The round head of the Oral-B Cross Action brush head is designed for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. CrissCross bristles are set at a 16 degree angle to reach deep between teeth to lift and power away up to 100% more plaque for a superior clean vs. a regular manual toothbrush. Compatible with Oral-B Genius 8000, Oral-B PRO 7000, 6000, 5000, 3000 and 1000, and Oral-B Vitality. Each order comes with 3x Oral-B Cross Action Electric Replacement Toothbrush Heads.