This replacement tubing is for use with the ramé-hart Automated Dispensing System and Oscillator. The standard interconnect tubing (28" long) attaches between the dispenser and the tip adapter or between the dispenser and the Oscillator. The extra long interconnect tubing (63") is recommended for systems that have a Manual or Automated Tilting Base. The blunt tubing (30") connects between the dispenser and the water source vessel.