... , J,E,N,T.. Insulation type: PVC, PTFE,PFA, Glass,Silica.. Conductor: Solid or stranded thermocouple wire perASTM E230 & ANSI MC96.1Insulation ... ASTM E230 and ANSI MC96.1 (International Color Codes Available) Type K thermocouple wire/Type K/Type T/Type J