Features: Heater wire 12V 40W/24V 40W for option. Compatible with Creality CR-10 CR-10S Ender 3 Ender 3 3D Printer. 0.4mm nozzle; 1.75 filament size; throat pipe; aluminum heating block. Extruder Hot End kit white wire was temperature thermistor red wire was heating tube. heating block and heat sink are connected and fixed by two screws making print head is more stable and won t loosen. Specifications: Main Material: Aluminum Alloy Heating Tube: 12V 40W/24V 40W(Optional) Installation Type: External thread connection Nozzle Size: 0.4mm Throat Pipe Length: 30mm Filament Diameter: for 1.75mm Operating Temperature : -40 ~ +260degC (-40 ~ +500 degF) Aluminum Block Size: 20 * 20 * 10mm / 0.8 * 0.8 * 0.4in Package Size: 15.6 * 10.8 * 2.5cm / 6.1 * 4.3 * 1.0in Package Weight: 78g / 2.8oz Packing List: 1 * Hotend Extruder Kit