3950 100K Thermistor 5 x 3950 100K Thermistor. Mould and platen heating. Resistance value at 25℃ 1% = 100K. Item Type: 3D Printer Heater Block. 3D Printer Heater Block Practical Use: Not only designed to 3D printer, but can also be widely applied to automotive industry, food processing, etc.