ral-B Pro Cross Action 5 Spare Brushes are finely engineered replacement heads with over 2,200 oblique filaments that remove up to 100% of bacterial plaque. They provide deep cleaning for cleaner teeth and healthier gums than those obtained with a manual toothbrush. Thanks to their new cross-shaped filaments, these brushes reach and deep-clean hard-to-reach areas for optimum oral hygiene. What's more, the recommended change of brushes is made easier by the change in color of the filaments, from green to yellow. Compatible with all Oral-B rechargeable electric toothbrushes (except Pulsonic and iO).