What stir bar came with it......length, dia, shape [poly or octo] pretty sure it isn't olive, star, circle, etc.
I put everything in the beaker while it is on the scale......in this order:
Stir bar, Nic, PG, VG, Flavoring (including stevia or other sweetener)
then I put it on the mag-mix and turn it high enough to spin, then turn it down so it doesn't [spin out].....which is the correct term for when the magnet breaks loose from the spin/magnet.
I would guess you received a 1" long polygonal stir bar with it, and will work absolutely fine.