Children's electric toothbrush replacement brushes: 4 small toothbrush heads, replacement brushes compatible with YUNCHI K3/Seago SG-513; replacement brushes compatible with Dada-Tech electric toothbrush baby & children from 0-3 years DT-BB1; replacement brushes compatible with Brush Baby WildOnes children's electric toothbrush. Not suitable for SG-602 / SG-902 - Safe material: Acrylonitrile butadiene styrene / thermoplastic elastomer safety material, food-grade brush heads, contains no Bisphenol A, lead or other known hazardous materials Soft DuPont bristles: Extra-soft nylon bristles to protect your childrens teeth, enamel and gums and provide gentle cleaning. The wavy bristles adapt to the tooth topography for thorough cleaning of the gums and hard-to-reach areas 4 Seago original small replacement heads per pack. Dentists recommend replacing the brush head at least every 3 months to avoid bacteria breeding Your child will develop a good habit of brushing for a lifetime. It helps children develop good habits, is