Oral B Replacement Brush Heads Cross Action EB50 2 PacksUpgrade your brushing experience with the Oral B Cross Action Replacement Brush Heads. These brush heads feature CleanMaximiser technology, with green bristles that turn yellow to indicate when it's time to replace your brush head. Designed with crisscross bristles, they effectively remove more plaque for a thorough clean. The brush heads are compatible with all Oral B rechargeable handles, making it easy to replace and maintain your oral hygiene