If you added 1.8mL bac water then you would draw to the 20 for 2iu.
Yeah 1.8ML is what I add to my 6mg serostim vials. So if if you are after 1iu then pull to the 10 mark, 2iu to the 20. Or if you are running larger doses then you could reconstitute with .9ML of bac water and 1iu = 5 mark, 2iu = 10 mark, etc.