12 - 18 AWG PVC insulated thermocouple extension pairs , individual and overall shielded with polyester/aluminum foil and outer PVC jacket.
Replace the fifth digit in TELDOR P/N with:
1 - for EX, 3 for KX, 4 for RX, 8 for JX, 9 for TX thermocouple type
Color code for conductors and jacket per ANCI MC96.1