Our new, easy-to-use Attest Steam Clear Challenge Pack is designed to monitor four-minute 270°F (132°C), four-minute 273°F (134°C) and three-minute 275°F (135°C) dynamic-air-removal (pre-vacuum and SFPP) steam sterilization cycles. These preassembled test packs let you inspect the biological indicator (BI) and chemical integrator (CI) before and after processing without opening the pack.