This product is a replacement NTC thermistor for the Nextruder and also for the XL Heatsink.
See below, which printers are compatible.
Compatible with : MK4, XL, MK3.9, MK4S, MK3.9S, CORE One/+
This product includes:
To replace the part/s, please consult our Assembly Manuals. Make sure to follow the manual for your printer model.