VERIFY Bowie-Dick Test Card is the smallest and most simple pre-assembled Bowie-Dick test pack product available. The Card is the first test that generates no waste at all. The Card is the test. The Card provides a convenient system for testing prevacuum sterilizers. The VERIFY Bowie Dick Test Card consists of a card printed on one side with bars of chemical indicator ink. On the opposite side of the card, space is provided for critical cycle information to be stored. Upon completion of the Bowie-Dick test cycle, you will have immediate validation of the air removal process. The Card is easy to use. In an otherwise empty chamber, place the VERIFY Card, with chemical indicator bars facing up, in a test card holder on the lowest shelf over the sterilizer drain. During the vacuum phase of the cycle, air is removed from this uniquely designed product. Following air removal, the chemical bars uniformly darken with exposure to steam. If air is trapped in the card during the exposure phase of the cycle, all the bars will not show even color change. It#s that simple.