ATTEST, Rapid Readout Biological Indicator for Steam 250 degrees F (121 C) Gravity or 270 degrees F (132 )C Vacuum Assisted Sterilizers. Brown cap. Monitors effectiveness of steam sterilization process with results in 3 hours. Includes biological indicators, auto-reader and log books. Must be used with 3M #190 ATTEST Auto-Reader. UOM: CA. Packaging: 50/BX, 4 BX/CA.