WATERPIK COMPATIBLE MODELS: Made by Waterpik and compatible with all Waterpik Sonic-Fusion and Sonic-Fusion Professional Flossing Toothbrush models FULL SIZE REPLACEMENT BRUSH HEADS: 25% larger vs. standard compact size, perfect for those who prefer a larger brush head. Replace Sonic-Fusion flossing brush heads every 3 months ADVANCED DESIGN: Flossing technology is built into the patented brush head; soft, high-low bristles pattern gently brushes while the Water Flosser removes plaque and debris from between teeth and below the gumline 2 COUNT, COLOR CODED: Included within each package are 2 full-size replacement toothbrush heads: 1 white with white color ring, 1 white with chrome color ring for multiple users INCLUDES: 2 brush head covers and easy-open packaging