- Pack of 4 Oral-B iO Ultimate Clean replacement brush heads, original and exclusive for Oral-B iO electric toothbrushes - Removes up to 100% more plaque thanks to its round design and 16° angled bristles - Smart bristles that change color to indicate the optimal time for replacement - Provides professional daily cleaning and helps keep teeth clean and bright - Easy to install and compatible only with Oral-B iO handles - Recommended by dentists, Oral-B is the leading brand in oral care - Replace the brush head every 3 months to maximize cleaning effectiveness - Do not use on children and keep out of their reach