VERIFY Dual Species Self-Contained Biological Indicators (SCBIs) are for use in monitoring steam sterilization and ethylene oxide (EO) sterilization processes. Each SCBI is completely self contained within a vial and contains a disc inoculated with dual species bacterial spores (Geobacillus stearothermophilus and Bacillus atrophaeus) and an ampoule of specially formulated soybean casein digest growth medium with a pH indicator. The vial label contains a process indicator for steam and EO.