Features 1、Fast Heat Transfer: The cartridge heater can transfer heat quickly by conduction when in direct contact with solids, liquids and gases. 2、Cartridge Heater: The cartridge heater is made of 304 stainless steel, with 0.3 square lead and high temperature resistant oxide powder. 3、Standard Heating Block: The mounting hole size of this heating block is standard, which is easy to install, suitable for Makerbot printer. 4、100K Thermistor: The thermistor has high accuracy, the resistance value at 25°C is 100K, with 1m PTFE wiring, has good insulation. 5、Wide Application: This kit is widely used in the manufacture of plastic and rubber parts in the automotive industry or food processing industry, etc. Specification Item Type: 3D Printer Hotend Parts 3D Printer Heating Block: Fixing Screw Thread: M6 and M3 (heat pipe and thermocouple) Heater Mounting Hole Diameter: Approx. 6mm/0.2in Thermocouple Mounting Hole Diameter: Approx. 3mm/0.1in Applicable for: For Makerbot printers 24V 40W 620 Ceramic Cartridge Heater: Material: 304 Stainless Steel Lead: 0.3 square Resistance: 2080 high temperature resistant excellent oxide powder Application: 1. Semiconductor chamber heating 2. Semiconductor die lead connections 3. Semiconductor leads and die bonding 4. Antifreeze and deicing of equipment in cold climates or applications 5. Humidity control 6. Patient comfort heating used in medical devices 7. Mold and platen heating 8. Sealing strip used in packaging equipment 9. Gas chromatography test sample heating NTC 3950 100K Thermistor: For 3D Printers: use TEMP SENSOR 11 in the for Marlin firmware Small Size: 1.25x2.0mm glass beads High Precise: Resistance Value at 25°C: 1% equal to 100K Wiring Insulation: High Temperature PTFE Package List 5 x 3D Printer Heating Block 5 x 24V 40W 620 Ceramic Cartridge Heater 5 x NTC 3950 100K Thermistor