Color Black Material Nylon Age Range (Description) Adult 【High Compatibility】Our toothbrush heads are compatible with FW-507/508/515/551/917/959/2011, FW-D1/FW-D3/FW-D7/FW-D8, most Seago series, ATMOKO HPnsly TB-5. They are NOT compatible with Fairywill FW-E11/FW-P11/FW-P80, and NOT for children's toothbrushes. 【Excellent Quality Replaceable Brush Head】Made of high quality ABS/TPE material, DuPont nylon. Removes more stains and plaque than a manual toothbrush for better gum health. The bristles are medium soft with rounded tips. Clean your teeth perfectly and protect your gums. 【3D Tailored and Three-Dimensional Cleaning】 30% more bristles than regular toothbrushes, the W-shaped bristles fit perfectly to the teeth and clean those areas that are hard to reach with the regular brush head. 【Dentists Suggest】 Replace the brush head at least every 3 months to avoid excess bacterial growth. Ten replacement brush heads for long-term use. 【Easy to Use】 Turn left to install, turn right to remove, easy to replace, no extra tools required. p> Buying our products means not only owning high-quality goods, but also enjoying our meticulous customer service. Our customer service team is ready to provide you with help and support.