This nozzle kit includes 1x Bimetal heatbreak, 1x plated copper nozzle , 1x plated copper heater block, 1x heater tube, high temperature thermistor sensor and 1x silicone sock (if your printing temperature is over300C, please remove the silicone sock before printing). Compatible with Ender 3 S1 Ender 3 S1 PRO, CR10 Smart Pro, Sermoon V1 , Sermoon V1 pro 3D Printer Bimetal Heatbreak: Using TC4 titanium alloy and copper two kinds of metal processing, titanium alloy has good thermal insulation, copper to help heat dissipation.For a long time of printing has an obvious role in improving the quality of printing. Nickel Copper plated nozzle 0.4mm: It has smooth inner hole and outer surface, which is more smooth and stable for material extrusion. It can be applied to all kinds of materials. The maximum working temperature is 500° Nickel plated copper Heater block: Copper has more than 3x the thermal conductivity of brass, and the copper alloy we use has been hardened and treated to re