J&J/Asp Sterrad� Chemical Indicators Case 14100 by Johnson & Johnson/Advanced Sterilization Products GROUP: Sterilization:Monitoring:Biological Indicators Item Description: Chemical Indicator Strip, 250/pk, 4 pk/Case Packaging Desc: Indicator Chemical Strip250/Pack 4Pk/Case Country of Origin: Harmonized Tariff Code: Product Description: They change colors to indicate that instruments have been exposed to hydrogen peroxide.