3M Attest™ Rapid Readout Biological Indicators – Blue Cap, 50/PkgAttest is an efficient and accurate biological monitoring system that features self contained indicators, preventing cross contamination and reducing false positives. Being safer and more effective than other systems, Attest allows vials to be crushed for the release of the medium. The unit has a 14 day capacity while generating reliable results within one to two days. This system also offers the Attest Record Book as an alternative recording method.