iO Ultimate Clean Replacement Brush Heads - BenefitsReduces plaque build-up along the gumlineThe dual-length bristles surround and reach deep in-between teeth and have high density for an ultimate cleanCombines Oral-B's iconic round brush head with gentle micro-vibrations for a surprisingly enjoyable experience and healthy teeth and gums for lifeTufted bristles help clean hard-to-reach areas of the mouthCompatible with Oral-B iO Electric Toothbrush HandlesIncludesiO Ultimate Clean Replacement Brush Heads (2 ct) - iO Ultimate Clean Replacement Brush Heads