Originally Posted by EdgeBrew
Can't wait to crank it up. The stir bar I bought is 28mm, the only one this shop had. Is that big enough for this 5L flask?
1.1" long could be ok, but you might want to pick up some more. I typically use one in the 1.25"-1.5" length for my 2L and 3L flasks. Depending on how much volume is in the flask. As long as you can get a good vortex going, without tossing the bar, you're good.