iO Replacement Toothbrush Heads Compatible with Oral B iO 3/4/5/6/7/8/9/10
Perfectly compatible: toothbrush heads compatible with Oral b iO 2/3/3S/3N/4/4N/5/5N/6/6N/7/7N/8/8N/9/9N/10/My Way electric toothbrush. For optimal cleaning, replace the brush head when the colour-changing bristles have turned white.