Sustain your oral health with the Precision Clean Toothbrush Head Refills by Oral B. The refill pack contains two toothbrush heads compatible with all Oral-B handles except pulsonic and io(sold separately). The head comes with clean maximiser technology, that turns green bristles yellow for optimal brush head performance and the best clean. It features unique precision clean bristles brush away plaque for a superior tooth-by-tooth clean. It offers everything you need to keep your teeth and gums healthy.