FEP Duplex 400F (200C) Solid or stranded thermocouple wire perASTM E230 & ANSI MC96.1 Flame retardant extruded fluoropolymer FEP Conforms to ASTM E230 and ANSI MC96.1 (International Color Codes Available) Parallel conductors Tinned Copper Flame retardant extruded FEP