Oral-B Pro Sensitive Clean Replacement Heads, Pack of 9 Heads – Features ultra-soft bristles that are gentle on gums, combined with regular bristles effective on plaque. Removes up to 100% more plaque while reducing gum inflammation by 100% compared to a manual toothbrush. Designed with new X-shaped bristles that reach difficult areas where round heads cannot reach. The head usage indicator changes the bristles from green to yellow, showing when to replace them for 100% effective cleaning. Compatible with all rechargeable Oral-B electric toothbrushes, except iO and Pulsonic.