PTFE insulated with exposed junction. Stranded wire with less than 0.1" overall diameter. General purpose.

Specifications

Sensor Range: -58 to 482°F (-50 to 250°C)
Cable: -58 to 482°F (-50 to 250°C)
Time Constant: Less than 0.5 seconds typical in liquid. Less than 2.5 seconds full reading.
Accuracy: ±0.9°F (±0.5°C) from 32 to 212°F (0 to 100°C)