OK® chemical indicator strips monitor all critical sterilization parameters for your steam sterilization load between 250 to 273 °F.

• Type 4 chemical indicator
• Distinct white to black color change
• Easy to read "OK" indicator output

OK® Steam Indicator Strips are for use in steam sterilization cycles between 250 °F(121 °C)and 273 °F (134 °C). Type 4 Chemical Indicator can be used to determine whether all critical parameters, time, temperature and saturation of steam. OK® Strips feature instantly recognizable 'OK' symbol after exposure to an effective steam sterilization cycle. K will turn from off white/white to dark brown/black color. 8" OK® Strip also features an indicator dot at the opposing end of the strip to extend it's reach in a tray or other sterilization package.