Our replacement toothbrush heads are made with filament, which has been recognized as the top quality in the oral care synthetic filament industry for over 70 years.<br> The bristles are made of American Thynex nylon. These rounded health toothbrush heads are the trusted choice for gentle, -safe and effective brushing, plus oral .<br> Innovative round head design, cup-shaped 360-degree full coverage of teeth, small and soft design, deep cleaning and care for gums<br> High-density bristles adopt irregular hole hair-planting technology, the amount of hair is increased by 40%, and the cleaning of stubborn stains is more efficient<br> You need to replace the toothbrush head. Generally, we recommend that you replace it at least every 3 months.<br> Color: Black<br> Material: Plastic+bristles<br> Package Contents:<br> 9 x electric toothbrush head<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store