McKesson, STER-ALL Performance Sterilization Biological Indicator Vial Steam, Box Of 100Product Description The ster all performance biological indicator Bi vial steam is designed to monitor the effectiveness of steam sterilization processes. Each self contained vial contains spores of geobacillus stearothermophilus, a highly resistant organism used as the standard for validating steam sterilizers. Product Benefits Ensures Compliance With Sterilization Monitoring Protocols. Compatible With Standard Steam Sterilization Cycles. Easy To Use