Time-released tablets that keep vacuum systems like new. Start with a Vacuum Shock tablet to break up and remove old accumulations that have built up deep inside the vacuum lines. Follow up with Vacuum Clean, a weekly maintenance tablet that restores vacuum pressure and acts as a continuous self-activating cleaner. Simply place 1 tablet in the chairside trap approximately every 5 days to clean and leave high-speed and low-speed evacuation lines clear of debris and fresh smelling.