... CopperInsulation:Mica tape with lappingJacket: Fiberglass Use: For kinds of electric installation for metallurgy,hot work,Petroleum,chemical industry, natural gas ... ,kerosene,etc. special environmentsProperty:Suitable for rated voltage not more than 600V,rated temperature not ... 90 minitesOpposite temperature: 65% can use under bending and fire,no toxic and harmful gases