This kit is Prusa i3 MK3 (R3 version), we use good quality parts, such as Original E3D Embedded Bowden Collet for Metal.Hotend thermistor and PINDA V2 probe from the supplier of Original Prusa.
Note: to avoid being demaged during transportation, we don't assemble it, you have to do it, you can follow it as the link:
The print head kit includes: 1pc Btech gears kit
1pc Spring
1 set screws
1pc 13*490mm textile sleeve
1pc PTFE tube 4x2x13 mm
1pc MK3S IR sensor with cable,screws,Magnet
1pc PINDA V2
1pc 4010 5V fan or Noctua fan
1pc v6 hot end with Silicone socks
1pc 24V 40W heater cartridge
1pc thermistor
1pc Nema 17 motor 750mmL cable
1pc 3mm Nylon filament 50cm
3pcs LM8UU linear bearings
8pcs Zip tie Printed parts：
1pc X-carriage
1pc X-carriage-back
1pc Cable-holder
1pc Print-fan-support
1pc Fan-shroud
1pc Extruder-cover
1pc Adapter-printer
1pc FS-lever
1pc FS-cover
1pc Extruder-body
1pc Extruder-idler
1pc Extruder-motor-plate