A replacement cartridge thermistor suitable for Prusa MK3S/MK3S+ andall E3D HotEnds using a cartridge type Heater block. This cartridge type thermistors use aSemitec 104NT-4thermistor, potted in a cylindrical stainless steel cartridge with a high conductivity ceramic based adhesive.Package include: 1 Prusa Hotend thermistorCompatible with:MK2/MK2S/MK2.5/MK2.5S/MK3/MK3S/MK3S+To replace yourHotend thermistor E3D please consult the assembly manual:https://help.prusa3d.com/guide/how-to-replace-a-hotend-thermistor-mk3s-mk3s_131675