7pcs Lab Mixed Size PTFE Magnetic Stirrer Mixer Stir Bars
Use along with an Erlenmeyer Flask and Stir Plate to do Stir Plate Yeast Starters.
Why a Stir Plate? The constant motion of a stir plate integrates oxygen, puts yeast in constant contact with nutrients, relieves built up CO2 and generally helps yeast to grow more rapidly. That also means smaller starters.
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Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.