REPLACEMENT BRUSH HEADS: A toothbrush head with soft, end-rounded bristles that provides gentle but effective plaque removal from hard to reach areas, brush heads should be replaced every three months on a dentist recommended schedule. ADVANCED DESIGN: Advanced brush head design with high-low bristle configuration to provide a superior clean with tightly packed bristles that help remove plaque. WATERPIK COMPATIBILE MODELS: Waterpik Complete Care 9.0 Water Flosser & Sonic Electric Toothbrush (CC-01CD010-1) and Waterpik Complete Care 5.0 (WP-861) 3 COUNT: Included within each package are 3 replacement toothbrush heads: 1 white with chrome color ring, 1 white with white ring, 1 with gray ring CUSTOMER SUPPORT: Waterpik’s Fort Collins, Colorado support team is available to help with any product questions or needs