Neodynium Rare Earth Button Magnet –
If you would like to make your own stir plate you can use a small computer fan & one of these magnets to make a magnetic stirrer.
Using a magnetic stirrer is easy & will optimise the growth of your yeast starter in a conical Erlenmeyer flask.
Can also be used to retrieve stir bar from flask.
These button magnets are neodymium with high level of magnetic flux.
They are 8mm diameter and 6mm thick.
Note: These are sold as individual units