The Propper BI-OK® Biological Indicator Incubator is a universal incubation device designed for both the Steam and the EO gas indicator vials with 13 cavities for for incubation and 1 vial crushing cavity. The incubation temperature can be selected by setting the toggle switch on the bottom of the unit. The recommended incubation temperature for Steam indicator is 57°C, for EO Gas indicator is 37°C.