Glass coated 100K thermistor with negative temperature coefficient. Superior in terms of fast response time, reliability and temperate range. This product can be used within a temperature range of -
50 C to + 300 C. Used for either for your hot end or heated bed to reliably measure the temperature. Requires 3D printer electronics board with a free analog input and 4K7 Ohm pull-up resistor. Within most firmware option 1 as temperature will work great.