These copper counter flow chillers are probably one of the fastest ways to chill wort on your Brewzilla system. They are more efficient than the immersion chiller that ships with the Robobrew.  Please not that the chiller does not come with any tubing.  You will need to purchase some tubing for the water in and out as well as high temperature food grad silicone tubing for the wort in and out.

These units are 23cm in diameter and about 18cm high. The input and output are approximately 10mm outside diameter. These can be used with gravity but are recommended to use with a pump.