1、Clear Division of Work: The white wire on the hot end of our set is connected to the temperature thermistor and the knitted wire is connected to the heating tube. 2、Fine Workmanship: We improved the hot end construction to avoid leaks, and the tubes fit perfectly and securely into the 3D printer connector, which means more accurate printing and less clogging. 3、Easy Operation: Remove the heating tube and temperature thermistor from the control box and connect them to the terminal housing and pins. You can then insert the hot end set for easier hot end set replacement. 4、Reduced Resistance: Our PTFE tube feed thin wire to be smoother. When printing, it reduces the resistance of the extruder, providing smoother travel and print quality. 5、Applicable Scenarios: This set is suitable for Creality Ender 3, Ender 3 Pro, Ender 3 V2 assembly to upgrade 3D printer parts. Item Type: Extruder Hot End Set Material: Alloy steel, brass, silicone Power: 40W PTFE Tube Length: Approx. 1m / 39.4in Nozzle Size: Approx. 0.4mm / 0.016in Application: For Creality Ender 3, Ender 3 Pro, Ender 3 V2 assembly upgrade 3D printer parts. 1 x Extruder Hot End 1 x Wrench 1 x PTFE Tube 2 x Silicone Cover 1 x Connector 4 x Nozzle