TEST SYSTEM, SPORE MAIL-IN (52/BX 4BX/CS) STER-ALL® Performance Sterilizer Monitoring Service For use in Steam, Chemical Vapor, Dry Heat and EO Gas Sterilization processes. Includes immediate Read-Out Integrator for steam cycles. 24-Hour Incubation All Steam cycles. 72-Hour Incubation Chemical Vapor cycles. Packaged: 52 Tests Per Box, 4 Boxes Per Case CAUTION: THIS PRODUCT CONTAINS NATURAL RUBBER LATEX WHICH MAY CAUSE ALLERGIC REACTIONS.