Biological indicators vials are easy to use and interpret with visual color readout in 24 hours (1261) or 480hours (1262/1264). Test packs present a challenge to the sterilization process equivalent to the AAMI recommended test packs. Each test pack contains a 3M Attest 1262 or 1264 Biological Indicator.- Super Rapid Readout Biological Indicator, 24-Minute Readout for 132C (270F), 3 or 4-Minute and 135C (275F) 3-Minute Steam Sterilization Cycles, Brown Cap, 50/bx, 4 bx/cs