Oral-B iO Ultimate Clean Toothbrush Refill Replacement Heads Black, 4 Pack The Oral-B iO Ultimate Clean replacement electric toothbrush heads are specially designed for an effective clean, for up to 100% plaque removal as of day 1. Features: Ultimate Clean combines Oral-B's perfect angle, with innovative new bristles, for Oral-B's best clean For up to 100% plaque removal as of day 1 On Oral-B's signature round brush head, bristles are meticulously arranged to surround each tooth for the best possible clean Dentists recommend changing the brush head every 3 months for the best clean Designed exclusively for and guaranteed to fit your Oral-B iO Number of toothbrush heads included in this pack: 4 Choose Oral-B, #1 used by dentists worldwide Box Contains: Oral-B iO Ultimate Clean Toothbrush Heads Black, 4 Heads Oral B iO Ultimate Clean 'Toothbrush Refill Replacement Heads' Black, Pack of 4 in Black