What's in the box:

Aibecy Metal Hotend Extruder Kit with 0.4mm Nozzle Aluminum Heating Block Silicone Sock 12/24V 40W Compatible with Creality CR-10 CR-10S Ender 3 Ender 3 Pro 3D Printer (24)

Features:
Heater wire 12V 40W/24V 40W for option.
Compatible with Creality CR-10, CR-10S, Ender 3, Ender 3 Pro 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.
The heating block and the heat sink are connected and fixed by two screws, making the 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 Range: -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