18/1 Black Single Conductor TFFN 150 Degree Wire. SOLD BY THE FOOT - 250FT = 1 Roll Features Approximately 0.0403in DiameterTFFN- Dry locations not to exceed 90 Degrees C MTW- Wet locations or when exposed to oil or coolant at temperatures not to exceed 60 Degrees C MTW- Dry locations at Temperature... See More