?Specially Designed?:This head is specially designed compatible with Bitvae D2 electric toothbrush.More dense bristles?stronger vibration and more thorough cleaning. ?Sanitary Packed?: Each toothbrush head equipped with dust cover then sealed into plastic bag and together packed in paper box. Three layers of protection avoid dust pollution during packing and transportation. Also, dust cover is perfect for travel. ?Teeth Protection?: 95%-98% top of bristle rounded before packaging. Just considering protecting teeth when brushing in high vibration. The teeth enamel would get worn if bristle was not rounded. ?High cost performance?: Dentists recommend replacing toothbrush heads every 3 months, A box of 10 pieces can meet your need to change your toothbrush, and the price is more appropriate. ?Timely service?? If you have any questions, you can ask a question on the detail page or contact us directly, We will reply to you as soon as possible, and our professional customer service will make every effort to ensure your satisfaction.