SporeCheck™ Biological Indicator Vials contain Geobacillus stearothermophilus bacteria spores and are intended for monitoring the efficacy of steam sterilization. 100 count. Steam sterilizer test system that provides reliable results in 24 hours, while being in compliance with local, state and federal guidelines. The SporeCheck™ system can be used with all types of steam sterilizers, including gravity, pre-vacuum and Statim or rapid steam Sterilizers.