• Perfect Compatibility: YMPBO toothbrush heads are fully compatible with Oral-B iO series electric toothbrushes. Standard size and easy to install. Fits all Oral-B iO series 10, 9, 8, 7, 6, 5, 4, and 3. • Dental Protection: The bristles of the heads are rounded at the end, which is gentle on teeth and gums, preventing enamel wear. • Deep Cleaning: Made with high-quality DuPont bristles, these replacements help to deeply clean and remove plaque, stains, and bad breath, leaving the mouth fresh and clean. • Individual Packaging: The replacements are sealed and individually packaged for easy storage and hygienic cleaning during travel. They are strong and durable, not easily broken or losing bristles. • Regular Replacement: To maintain oral health and hygiene, it is recommended to replace the heads every 3 months. This pack contains 6 heads, enough for 24 months of use. • Specifications: Color: Black. Quantity: 6 Pieces. Material: Premium PP Handle and Food-Grade DuPont Bristles. Process: 99% soft round bristles.