Oral-B iO Gentle Cleaning - Original Replacement Toothbrush Heads for Oral-B iO Electric Toothbrushes - Brush Heads, Toothbrush Attachment, Replacement Brushes for Sensitive Gums - Black, Pack of 4

["High bristle density: Oral-B's gentle cleaning brush heads have up to 4000 soft bristles for gentle and good cleaning","COLOUR CHANGING BRISTLES: The Oral-B brush heads feature colour changing bristles that signal when the brush head should be changed for maximum cleaning performance","Replace every 3 months: a worn brush head makes cleaning difficult and leaves bacterial plaque behind. For superior cleaning, change brush head when bristles have faded to white","For Oral-B iO handpieces: superior cleaning power with the single brush head designed - and guaranteed to fit - for the Oral-B iO electric toothbrush","Dentist, inner confidence Oral-B: Oral-B is the No. 1 toothbrush brand, which is most commonly recommended by dentists worldwide"]