Attest Super Rapid Readout Biological Indicator for Steam Sterilization - Brown Cap, 50/Bx. Provides BI results in 24 minutes in 3M Attest 490/490H Auto-readers with software version 4.2.7 or greater. Dynamic-air-removal (Pre-vacuum and SFPP): 132˚C (270˚F) 3 or 4 min. 135˚C (275˚F) 3 min. Package of 50 indicators