Pursonic Pursonic 8 pack replacement brush heads for s450/s625 models

8 Replacement Brush Heads for S400/S450/S625 models. Dental professionals recommend replacing your brush heads every three months or earlier if the bristles become spread out. In addition, we recommend you replace the brush heads anytime you?ve had a cold or have been sick. Pursonic 8 pack replacement Brush Heads for S450/S625 models