Sustain your oral health with the Cross Action Toothbrush Head Refills by Oral B. The refill pack contains four premium replacement toothbrush heads compatible with all Oral-B handles except pulsonic and io(sold separately). The heads feature perfectly angled bristles at 16 degrees that target plaque to remove up to 100% more plaque compared a regular manual toothbrush. The head comes with clean maximiser technology, that turns green bristles yellow for optimal brush head performance and the best clean. It offers everything you need to keep your teeth and gums healthy.