Fiberglass Duplex 950F(570C) Solid or stranded thermocouple wire perASTM E230 & ANSI MC96.1 Braided fiberglass with high temperature impregnation*(24 to 30 AWG Served Glass) Conforms to ASTM E230 and ANSI MC96.1 (International Color Codes Available) Parallel conductors Tinned Copper Braided fiberglass with high temperature impregnation*