Magnetic stir bars are coated magnets used to stir liquids in a sealed container. They can stir fluids without requiring an opening in the container. They are a popular way of stirring liquids in modestly sized containers. Magnetic stirrers are used in chemistry and biology research, especially in medicine. Home brewers often use them to help make a yeast starter.

1.Material:NdFeB magnet inside,PTFE/Teflon coated.
2.Temperature resistant:-200~110℃
3.Cylindrical stirring bars without center molded pivot ring minimizes the contact area between the bar and the vessel; reduces friction and chattering.