1、Included Parts: The hot end kit includes heating aluminum block, thermistor, heating rod, nozzle, heat break, etc., easy to install and replace, have good compatibility. 2、Applicable Model: This heating hot end kit is suitable for Ender 3 S1, for Ender 3 S1 Pro, for CR 10 Smart Pro, for Sermoon V1, for Sermoon V1 Pro 3D printer model. 3、Heat Break: The heat break is made of TC4 ti alloy metal, which has good insulation and can reduce heat conduction upwards, effectively improve printing quality. 4、0.4mm Nozzle: The nickel plated copper nozzle has glossy inner hole and finish to ensure stable extrusion, with a maximum work temperature of 300℃. 5、Heater Block: Nickel plated copper heater block has high thermal conductivity, with hardening process, oxidation resistance, suitable for high temp printing.