1m stainless steel braid from a hot water hose.
I was able to (carefully) remove the compression fitting hose barbs from inside the hot water hose to fit the braid to the T.
The cunning observer may have picked up there is a brass barb on the front the esky too... that's because I rightly screwed the first SS braid, had to buy a new one and now have spare hose barbs - yay! :/