Effective And Healthy - Using FDA Approved Dupont Tynex Bristle To Provide Effective And Healthy Brushing And Cleaning. Each Brush Come With A Protective Cap To Keep It Clean. | Broad Compatibility - Compatible With Most Standard Oral-B Toothbrush Handles. (see full list in description below) | More Eficient Cleaning - Our Toothbrush Heads Vave Designed Contoured Field Of Micropulse Bristles For Deep Clean In Removing Plaque And Defending Against Gingivitis. | Reminder Function - The Bristles Will Fade From Blue To White To Remind You To Replace The Toothbrush Head (Recommend To Replace the brush head Within 3 months). | Money Back Guarantee - We Provide 100% Satisfaction Guaranteed or Your Money Back Service.