The Attest Biological Monitoring System is a convenient, reliable system for monitoring steam sterilization. Test results known in 24-48 hours. The incubator automatically crushes vial to release medium, makingit safer and easier to use than other systems. It has a 14-vial capacity. See-through cover allows for easy observation and reading of indicator color change. The dry-block design is pre-set to proper incubation temperature to ensure accurate, consistent results.