FeaturesChemical, humidity, UV and weather-resistantB-390 inserts are printable, rigid inserts designed to be printed and affixed to a wire using extruded, clear PVC Brady® wire marking CarriersBrady® Durasleeve® markers create a durable legend-40 to 212 deg F service temperature2 years shelf life when stored below 80 deg F and 60% relative humidity