Honeywell 100kOhm NTC Thermistor in an axial package. (135-104LAF-J01)
See the Honeywell Website for more information if you require.
E3D HotEnd Compatibility:
On some of our heater blocks there is a hole for an axial thermistor. Be warned that this through-hole is nearer to the heater cartridge than the nozzle so can result in inaccurate nozzle tempreature measurements and is therefore not recommended.