Product Description Oral-bs best for holistic mouth cleaning. The innovative cleanmaximiser technology dyes green bristles yellow, thereby indicating the optimal time for the brush head for the best cleaning. The Premium CrossAction brush has perfectly angled bristles to reach deep between teeth and removes up to 100% more plaque than a regular manual toothbrush. Compatible with all Oral-B handpieces, except Pulsonic & io. Set Contains: 8 x replacement brushes.