Oral-B iO Series Gentle Care Black, Original Replacement Round Heads, Suitable for Sensitive Gums, 6

HIGH AMOUNT OF FILAMENTS - Oral-B Gentle Care refill heads are densely equipped with up to 4000 soft filaments for a smooth, perfect clean COLOR-CHANGING FILAMENTS - Oral-B refill heads feature color-changing filaments to indicate when to change the brush head and maximize cleanliness REPLACE EVERY 3 MONTHS: A worn head makes cleaning difficult and does not act on the entire bacterial plaque. For superior cleaning, change brush head when filaments fade to white EXCLUSIVE FOR ORAL-B IOS HANDLES - Get superior cleaning power with the unique brush head uniquely designed to perfectly fit your Oral-B iO electric toothbrush DENTIST-ENVANCED - Oral-B is the #1 dentist recommended toothbrush brand worldwide