STERIS Verify Bowie-Dick Test Card is designed for use in a 132 to 134 _C (270 to 273 _F) pre-vacuum steam sterilization cycle with an exposure time of 3 to 4 minutes. Available for single or multiple vacuum cycles, the multiple chemical bars will change color from yellow to black. If air is trapped in the card, the bars will not darken equally. Provides an easy and accurate way to test air removal and steam penetration in pre-vacuum steam sterilizers operating at 132 to 134 _C. It is a lightweight, compact, one piece system that is pre-assembled and ready for use. The Dart Daily Air Removal Test eliminates the need to spend time folding towels and preparing packs necessary for traditional Bowie Dick Test Packs.