Flat surface toothbrush heads effectively remove plaque Designed to be used with the ION-Sei Ionic Toothbrush Flat surface toothbrush heads for effective removal of plaque Spiral-shaped bristles keep their shape for longer Helps to remove bacteria from your mouth Medium firmness helps to achieve a deep clean Change your brush head every 3 months Brush your way to a healthier mouth with ION-Sei’s Standard Toothbrush Heads. Designed with a flat surface that’s tough on plaque, these firm but gentle brush heads will leave you with a cleaner, fresher mouth. When paired with your ION-Sei Ionic Toothbrush, they’ll not only remove plaque, but control the bacteria that causes it too. ION-Sei Standard Toothbrush Head x2