Our replacement toothbrush heads are crafted with filament, recognized as the highest quality in the synthetic filament industry for oral care for over 70 years. The bristles are made from American Thynex nylon. These rounded health toothbrush heads are the reliable choice for gentle, safe, and effective brushing, plus oral health. Innovative round head design, dome-shaped 360-degree full coverage of teeth, small and soft design, deep cleaning and gum care. High-density bristles use irregular hole planting technology, the amount of hair is increased by 40%, and the cleaning of stubborn stains is more effective. You need to replace the toothbrush head. Generally, we recommend replacing it at least every three months. Color: Black Material: Plastic+Bristles Package Contents: 9 x Electric Toothbrush Head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be a little different from the real one. The measurement allowed error is +/- 1-3cm.