This is stainless steel extension kit was made for extending height of 65L Brewzilla or 65L Digi Boil to a bigger capacity from 65L to 89L maximum. It can be add-on the current 65L Brewzilla or 65L digi boil you purchased. This is a weldless fitting can insert into 65L Brewzilla or digi boil with silicone seal around and clips to hold it tight.
With this extension kit you are able to brew more in the current 65L Brewzilla or 65L Digi boil. Or you can boil more wash if you are running the 65L digi boil as the boiler of a still.