> For the complete documentation index, see [llms.txt](https://hrftank.gitbook.io/hrftank/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hrftank.gitbook.io/hrftank/iii-build-manual-electronics/7.-power-system/7.2-parts-required-for-this-step.md).

# 7.2 Parts required for this step

* Screws:
  * M3x8 (4 pcs)
  * M3x10 (4 pcs)
* Heat set inserts
  * M3x4 (OD5 8 pcs)
  * *optional: M6x8 (OD 9 mm, 2 pcs)*
* ESC mount:
  * 5.5 mm zip-ties (4 pcs), or:
  * RC car ESC mount plate 

{% hint style="danger" %}
**Warning:** When buying from Chinese marketplaces, **always check the polarity of EC5 connectors!** Sellers often mix up male and female types. Examine the product photos closely before you order.
{% endhint %}

* Power wires:
  * EC5E-M (panel mount EC5, male type plug) connector **with wire**
  * EC5 1M to to 2F Y-adapter
  * EC5 connector with 10 cm cable
  * *4 mm gold connector (6 pairs) and XXX AWG silicon cable (black and red)* - ESC leads extension, if needed
  * Heatshrinks - red and black, at least 5mm diameter when expanded
* Electronics:
  * Flight controller
  * 2x ESC
* If you decide to setup watercooling:
  * PG7 cable gland (5 pcs)
  * multi-core cable - 10x0,14 mm<sup>2</sup>&#x20;
  * DS18B20 temperature sensor, THT package (2 pcs)
  * Servo connector (4 pairs)
  * Silicone tubing 4x8 mm (IDxOD)
  * 2.5 mm zip-ties