Oral B iO Ultimate Clean, 4 Ks, Replacement brush heads for Men, The Oral B iO Ultimate Clean replacement toothbrush heads help you to get the best results from your oral hygiene. Changing the heads regularly guarantees you are always cleaning your teeth as effectively as with a new brush. Characteristics: removes plaque cleans teeth even in hard-to-reach places brushes teeth more effectively than a manual toothbrush comfortable and easy handling How to use: Attach the replacement head to the appropriate brush and click into place. Rinse the brush head thoroughly under running water after every use. Replace the brush head regularly, ideally every 3 months.