The Oral-B iO Ultimate Cleaning Toothbrush Heads combine powerful but gentle micro-vibrations with our unique, dentist-inspired round brush head for a professional cleaning feeling every day. Designed for Oral-B iO electric toothbrushes, the ultimate cleaning brush heads help remove up to 100 percent more plaque than a conventional manual toothbrush, leaving teeth clean and bright. Precisely tilted to 16 degrees, the bundled bristles help clean hard to reach areas in the mouth. As dentists recommend changing the brush head every 3 months for best results, Oral-B replacement brush heads feature colour-changing bristles that signal when it's time for a change. Superior cleaning power with the only brush heads designed - and guaranteed to fit - for the Oral-B iO electric toothbrush.