Tuttnauer Rapid Biological Indicators for Steam Sterilizers, 1 Hour Results, 50/Box

Tuttnauer Rapid Biological Indicators for Steam Sterilizers, 1 Hour Results, 50/Box. Compatible with class S gravity and class B pre-post vacuum autoclaves. Self-contained, inoculated with viable a population of Geobacillus stearothermophilus bacterial spores. Changes color from pink to brown when exposed to steam. Easy to use.