• Broad compatibility with Oral B iO series 2, 3, 4, 5, 6, 7, 8, 9 and 10 electric toothbrushes. • High-quality DuPont bristles with rounded design for gentle and effective brushing that cares for gums. • Indicator bristle technology that changes color to warn of the need for replacement every 3 months. • Includes 12 heads with individual protective caps for optimal hygiene against dust and bacteria. • Varied pack containing 6 units in white and 6 units in black. • Hygienic individual caps that make the heads practical for daily use and travel.