Weight: N.W 50g, G.W 140G. Package size: 165x155x50mm. 1.High quality thermistor and heating tube is up to 260C degree, with rapid-risen temperature, precise temperature control and good stability. 2. The optimized internal structure of seamless connection between hotend and heatbreak accelerates the hotend to dissipate heat and the heatbreak to insulate heat, letting go of nozzle blockage. 3. Insulation silicone sock with flame retardant, Equipped with flame retardant material, it has good heat preservation effect and effectively keep the heat block and hotend clean. 4. 0.4mm ultra thin heatbreak wall with excellent heat insulation, The roughness of hotend inner hole is Ra0.4 smooth filament-pushing. Optimized design of heatbreak decreasess the loss of heater block temperature by reducing heat conduction, and at the same time, it transfers its temperature to the radiator, which ensures the production stability.