The Oral-B CrossAction brush head is our most advanced brush head and is now available as a Black Edition. With the perfectly angled CrissCross bristles, it reaches deep into the interdental spaces and ensures superior plaque removal compared to a conventional manual toothbrush. The blue indicator bristles indicate when you should change the brush head. The brush head is compatible with all electric toothbrushes from Oral-B, except Oral-B Pulsonic.