Oral-B iO Series Ultimate Clean Replacement Brush Heads deliver a professional clean feeling every day using powerful yet gentle micro-vibrations combined with a dentist-inspired round brush head. Designed exclusively for Oral-B iO electric toothbrush handles, they provide a precise, controlled clean that supports healthier teeth and gums. These genuine Oral-B iO brush heads help remove up to 100 percent more plaque versus a regular manual toothbrush. Precisely angled at 16 degrees, the tufted bristles clean hard-to-reach areas along the gumline and between teeth for a noticeably cleaner, brighter smile. Each brush head includes color-changing indicator bristles that fade to white, clearly showing when it’s time to replace the head, as recommended by dentists every three months. This helps maintain consistent cleaning performance without guesswork. Guaranteed fit, safety tested, and engineered by Oral-B for optimal performance. For busy iO users at home and on the go: This 4-pack covers 1 year of worry free brushing. Stay stocked for months without thinking about reordering, whether you’re brushing at home, at work, or while travelling.