Inspired by professional dental cleaning tools, the Oral-B FlossAction refill heads have an efficient, rounded design. They work on a single tooth at a time for individual results. MicroPulse bristles help remove plaque trapped between teeth. The colored bristles fade to indicate when the heads need to be replaced. These electric toothbrush refill brush heads fit a wide variety of electric toothbrush models including Oral-B ProfessionalCare Series and Oral-B Vitality Dual Clean. Available in sets of 3.