STERIS Verify Self-Contained Biological Indicators (SCBIs) are available as either single or dual species formats: Bacillus atrophaeus (BA) for ethylene oxide and/or Geobacillus stearothermophilus (GS) for saturated steam sterilization. This flexibility allows the use of Verify SCBI in monitoring steam sterilization [250?F (121?C) gravity, 270?F (132?C) pre-vacuum, 270?F (132?C) gravity flash] and ethylene oxide (EO) sterilization processes. Each SCBI is completely self-contained in a vial with a disc inoculated with the specified spores, and an ampule of specially formulated soybean casein digest growth medium with a pH indicator. In addition, the vial label contains a chemical indicator for steam and EO.