1HOTEND UPGRADE KIT: Including heating block, heating pipe, 0.4mm nozzle, thermistor, protection cover, pneumatic connector, fan, and other parts. 2APPLICABLE MODEL: This hot end upgrade kit is suitable for Ender 3, for Ender 3S, for Ender 3 Pro, and similar 3D printer models, with good compatibility. 3HIGH SPEED FAN: Adopt a 24V high speed fan to efficiently dissipate heat and prevent damage caused by overheating during use at the hot end. 4TIGHT CONNECTION: Brass nozzle and pipe are seamlessly connected to prevent material leakage and blockage, ensuring high efficiency printing. 5SILICONE SLEEVE: The hot end is equipped with silicone sleeve to help maintain a lower temperature and ensure more stable and reliable printing process. Item Type: Hotend Kit Product Material: Aluminum, Stainless Steel, Brass Installation Method: Male Thread Connection Applicable Model: For Ender 3, for Ender 3S, for Ender 3 Pro Nozzle Size: 0.4mm Pipe Length: Approx. 30mm / 1.2in Aluminum Block Size: Approx. 20 x 20 x 10mm / 0.8 x 0.8 x 0.4in Operating Temperature: -40 to 260 (-40 to +500) Thermistor and Heater Cable Length: Approx. 1.2 meter / 3.9ft Kit Includes: 1 x Aluminum Heating Block 1 x Heating Tube (1.2M, 24V 40W) 1 x 0.4mm Brass Nozzle 1 x M6 x 30mm Pipe 1 x Thermistor (1.2M XH2.54) 1 x Protection Cover 1 x Silicone Sleeve 1 x Pneumatic Connector 1 x PTFE Pipe (400mm) 1 x 4010 Axial Flow Fan (24V 1.2M XH2.54) 1 x 4010 Blower (24V 1.2M XH2.54) 1 x Hotend Kit