Hi Nic,
Besides the tubing, you will also need the fittings, a water tank with a pump, radiators, fans, ***.
Such as the CPU water cooling kit BPTA-SBSKIT-SI.
You can switch the CPU water block to your OLED one.
https://shop.bitspower.com/index.php?route=product/product&path=416_417&product_id=7962