Includes - 2 years supply (8 Count) electric toothbrush replacement heads refill with individually color-coded identifier rings to keep your brush heads well organized and share with family. Perfect Fit - Belwick brush heads are compatible with the entire lineup of Oral-B Braun electric toothbrush models, except Oral-B Sonic, Pulsonic and io series. They are super easy to install and fit perfectly. Simply remove your old brush head and click on the new one. Effective Cleaning - These replacement brush heads have Cross Angled and Multi-level bristles to remove 10x more plaque versus a manual toothbrush and soft end-rounded nylon bristles to gently clean the gumline. Superior Quality - Our toothbrush heads are made from high-quality materials and soft DuPont nylon bristles which have been recognized as the pinnacle of quality in the oral care industry. The brush heads are durable and provide a great brushing experience!