OCR 1M NTC3950 Thermistors for Reprap 3d Printer Extruder or Heated Bed Pre-wired with Teflon Insulated Wiring 5 Pcs For 3D printers: use TEMP_SENSOR 11 in Marlin firmware Use it with heated bed or extruder Popular low cost thermistor for RepRap 3D printers Resistance value at 25C=100K Conviniently pre-wired with 1 meter long high temperature teflon insulated wiring