Product Description 5 pack of replacement brush heads Amazon.com Ultrasonex toothbrush users find that this ultrasonic toothbrush continues to bust through plaque and maintain clean teeth between trips to the dentist. However, to get the full cleaning effect, you’ll need to remember to replace the brush head when bristles begin to look bent and worn. This three-pack of replacement brush heads stores in the medicine cabinet until you need it. All brush heads are small-sized, offering a smaller, narrower head and jagged rows of bristles, and easily press onto the end of any Ultrasonex toothbrush model. --Cristina Vaamonde