We know the health of your child is so important. So we use only the softest silicone material in our infant toothbrush products. High quality food-grade silicone, BPA free , we ensure our product safety for babies. It is safely for the teeth and gums and easily gives baby a comfortable cleaning process. And our finger toothbrushes are also popularly used with cats, dogs, and other pets. Clean before using the product , use steam or boil cook for 3-5 minutes disinfection. It is recommended to replace the finger toothbrush after 2-3 months. To protect the baby's mouth, our design is 0.67” for inner diameter. If parents' fingers are too big, please buy carefully.