Oral-B iO Series Replacement Brush Heads, 6 ct.. Oral-B iO Series Replacement Brush Heads, 6 ct.Oral-B iO Series Replacement Brush Heads.... The Oral-B iO Series combines powerful, but gentle micro-vibrations with Oral-B's unique dentist-inspired round brush head design for a professional clean feeling every day. Ultimate Clean Refills help remove plaque, leaving teeth feeling clean and bright. Tufted bristles help clean hard-to-reach areas of the mouth. Gentle Care Refills use extra soft bristles to adapt to the curves of teeth and gums. Dentists recommend changing your toothbrush head every 3 months for best results. You will receive 3 Oral-B iO Ultimate Clean Replacement Brush Heads and 3 Oral-B iO Gentle Care Replacement Brush Heads. Compatible with Oral-B iO Electric Toothbrush Handles. Product Features: Combines Oral-B's unique round brush head with gentle micro-vibrations for a surprisingly enjoyable experience and healthy teeth and gums for lifeUltimate Clean Refills: Dual-length bristles surround and reach deep in-between teeth and have higher density for an ultimate cleanGentle Care Refills: Optimized bristle patterns adapt to the curves of the teeth and gums, but are extra soft for maximum comfortCompatible with Oral-B iO Electric Toothbrush HandlesDentists recommend changing your brush head every 3 monthsREAD MORE