DeG CHT Thermocouple, Part #CHT-T-10 10mm Spark Plug Thread DeG CHT Thermocouple, Part #CHT-T-10, 10mm Spark Plug Thread Adaptor. Color-coded #18 gauge wires, red (-) and yellow wire (+).Terminated with High-Temp #6 round terminal lugs, Includes Heat Shrink... $55.00