1Wide Compatibility: This hotend extruder kit has strong compatibility and good applicability, suitable for Makerbot 1.75mm filament 3D printers, ensuring seamless integration and upgrading. 2High Performance: Equipped with 12V 40W NTC heater to prevent frequent combustion and breakage of NTC. 304 stainless steel nozzle, 280 high temperature resistance resistor, 12V high speed fan. 3No Leakage and Blockage: The nozzle is seamlessly connected to the pipe, effectively preventing leakage or blockage of materials during the extrusion process, ensuring the smoothness and continuity of printing. 4Accurate Control: Using NTC connector with terminal, the design is simple, easy to install and replace, ensuring the accuracy and response speed of temperature control, and maintaining a stable extrusion effect. 5High Efficiency: This extruder kit has a reasonable design, equipped with heating block, nozzles, and PTFE tube, providing stable and reliable connection, greatly improving printing efficiency and accuracy. 1 x Main Body 1 x Accessory 1 x Heating Block 1 x PTFE Tube 4 x Nozzles