Check the listing for details. Cybersonic 3 Compact Replacement Brush Heads, 8 Pack. Condition: New. Listed at 49.99 USD. Package of 8 compact brush heads. Includes 4 white bristle brushes and 4 blue bristle brushes. Replacement brush heads are designed specifically for the Cybersonic3 System are compatible with all Cybersonic Systems including the Cybersonic Classic Compact brush head is what comes standard with all Cybersonic Electric Toothbrushes, designed to mimic a dentist's professional brush for effective cleaning on back teeth and hard to reach areas Soft bristle design combined with the patented Harmonic Resonance technology that comes with every Cybersonic kit, uniquely uses each vibration at a specific frequency for a perfect dentist like cleaning every time Cybersonic has over 25 years of making oral care easier, faster, and a more effective - designed by Dentists for those looking for the just left the dentist feeling every day Our guarantee to you is 100% customer satisfaction, with a 30 day money back guarantee no questions asked, along with a full 1 year manufacturer's warranty Snap-on sanitary dust caps included We can substitute compact brush heads or any Cybersonic brush design upon request