> For the complete documentation index, see [llms.txt](https://ms-kb.msd.unimelb.edu.au/next-lab/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ms-kb.msd.unimelb.edu.au/next-lab/3d-printing/open-access-printers/prusa-open-access/hardware-glossary/hotend-and-nozzle.md).

# Hotend & Nozzle

The Prusa i3 MK3S uses a standard E3D V6 hotend. The hotend consists of the following parts:

1. The heatsink
2. The heatbreak
3. The heater/hot block
4. Heater Cartridge
5. Thermistor
6. Cooling Fan
7. Teflon/PTFE tube that acts as a filament guide

![Image from E3D Online](/files/-MS0j_xVaFe8oXU1DG0u)

![Image from 3DPrinting Stack Exchange](/files/-MS0S9sMvL6haWUVNb3d)

For details on how to assembled/disassemble the hotend itself (note that the blue fan shroud and fan is not necessary in the i3 MK3S), read here:

{% embed url="<https://e3d-online.dozuki.com/Guide/V6+Assembly/6?lang=en>" %}

E3D's ecosystem makes swapping nozzles to different sizes or types easy. If the nozzle has an M6 thread which is sufficiently long enough, it can be used.

{% hint style="danger" %}
**Swapping the nozzle on the V6 requires a little finesse as there's a chance to easily break the heatbreak if not done properly.**
{% endhint %}

**Read here to find out more:**

{% embed url="<https://help.prusa3d.com/en/article/changing-or-replacing-the-nozzle-mk2-5s-mk3s-mk3s_2069>" %}