- Pack of 4 Oral-B iO Ultimate Clean replacement brush heads in black - Removes up to 100% more plaque than a regular manual toothbrush - Precisely angled 16° bristles to reach difficult areas of the mouth - Bristles fade to white to indicate when to replace the brush head - Exclusively for Oral-B iO electric toothbrush handles, ensuring a perfect fit - Professional round design inspired by dentists for superior cleaning - Recommended replacement every 3 months to maintain cleaning effectiveness - Leading brand recommended by dentists worldwide for oral care - Ideal for those seeking advanced oral hygiene and deep plaque removal