Oral-B FlossAction Toothbrush Heads contains 4 individual toothbrush heads with CleanMaximiser technology that indicates when to change the toothbrush head for optimal cleaning. The FlossAction bristles aid in removing plaque from the tooth\'s surface. Compatible with all Oral-B handles excluding Pulsonic & iO. Oral-B Floss Action Toothbrush Heads feature specially designed engineered Micro Pulse bristles aid in loosening plaque and remove up to 100% more plaque than a regular manual toothbrush. The bristles are developed with Clean Maximiser technology that turns bristles from green to yellow to indicate when to change the toothbrush head for optimal brushing and cleaning. The rounded brush head helps to reach deep between the teeth to ensure the entire tooth surface is treated. These toothbrush heads are compatible with all Oral-B handles excluding Pulsonic & iO. Key Features of Oral-B Floss Action Toothbrush Head Floss Action design feature that helps remove 100% more plaque than a manual toothbrush Clean Maximiser Technology for optimal brushing Targets plaque all over tooth surface Compatible with all Oral-B handles excluding Pulsonic & iO