1. The extended brush head ensures efficient plaque removal with gentle sonic technology. 2. The blue indicator bristles signal when to replace your brush head (every three months). 3. Suitable for electric toothbrushes. 4. Gentle: The brush head is made of imported fur material, which is soft on teeth and causes no irritation or allergies. Specifications: Features: The standard diameter of the bristles is 0.15 and the hardness is moderate (softer). Specifications: Material: imported brush Suitable toothbrush: suitable for general use Model: S32-4 Scope of delivery: 20x Compatible Replacement Brush Heads Note: 1. Please allow a slight error margin due to manual measurement. Make sure you don't mind before bidding. 2. The color may vary depending on different monitors, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your receiving information (e.g.: name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and, we have provided detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please do not hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!