To be used the day of the test. Probably the
best $30 insurance policy you can possibly buy. Highly
recommended as a compliment to both the DX series and MC1
programs, especially if you are a large person and/or a daily
smoker. Is essentially a concentrated version of the PH-5.
This is for the person that cannot carry a 16oz container with
them, the "final-flush" comes in a 1oz bottle.