This Teflon coated 1" magnetic mini stir bar is the same one that comes with the Stirstarters Economy Stirplate.
And it's the only size that will work with it. Be sure to order extras.
Sometimes we brewers have a tendency to lose things, especially small things so
it doesn't hurt to have some extras on hand. I have also accidentally poured the stir bar
down into my beer with the yeast. Hey....it happens.