Oral-B iO Ultimate Clean Electric Toothbrush Heads, Pack of 8 Black Replacement Heads, Removes 100% of Plate, Designed for Your Oral-B IO, Fits the Letterhole

'COLOR-CHANGING BRISTLES: Oral-B replacement brush heads have color-changing bristles to signal when to replace them to restore 100% more effective cleaning'
REPLACE EVERY 3 MONTHS: A worn out toothbrush head makes cleaning teeth more difficult, not removing bacterial plaque. For a deep clean, replace the brush head when the bristles change colour
"EXCLUSIVE FOR IOS ORAL-B HANDLES: The original Oral-B replacement brush head is designed for deep cleaning, the only compatible with your Oral-B iOS electric toothbrush"
'TOOTH CHOICE: Oral-B, the most widely used toothbrush brand by dentists in the world']