The sensor is a drop-in replacement for the Prusa MK4. The spring next to the cartridge makes the sensor more durable and prevents the cable from breaking.
You can also get this thermistor in a bundle with heater here: MK4 Bundle
- Thermistor sensor: Semitech 104GT-2 (100KΩ)
1x Hotend Thermistor - for Prusa MK4