Overview: The Oral-B iO Ultimate Clean Electric Toothbrush Head is designed to provide a superior clean by effectively removing plaque and promoting healthier gums. Its unique twisted and angled bristles reach deep between teeth and along the gumline, ensuring thorough cleaning. This pack includes two replacement brush heads, compatible with all Oral-B iO electric toothbrush handles. Key Features: Advanced Bristle Design: Twisted and angled bristles are engineered to reach deep between teeth and along the gumline for enhanced plaque removal. Superior Plaque Removal: Removes up to 100% more plaque than a manual toothbrush, starting from day one of use. Smart Pressure Sensor: Provides real-time feedback to help you maintain optimal brushing pressure, protecting gums from excessive force. Indicator Bristles: Color-fading bristles signal when it's time to replace the brush head, ensuring consistent cleaning performance. Compatible with Oral-B iO Handles: Designed exclusively for Oral-B iO electric toothbrushes, ensuring a perfect fit and optimal performance. Specifications: Compatibility: Oral-B iO Series 3, 4, 5, 6, 7, 8, 9, and 10 electric toothbrush handles. Included: 2 replacement brush heads per pack. Recommended Replacement: Every 3 months for optimal performance. Color: White.