PTFE Turbo Stirrer Bar, Elliptical

Extra power Samarium-Cobalt magnets:

Stirring bars using rare earth magnets have significantly increased magnetic strength compared to those using Alnico magnets, but more importantly, they are almost totally resistant to demagnetisation. Stirring bars using rare earth

magnets are identified by a carbon black spot which is chemically inert.

Note on using Rare Earth Stirrer Magnets:

The high magnetic coupling power of Rare Earth stirrer magnets can give rise to erratic stirring effects such as magnet migration and tumbling while the powerful attraction between the stirrer and the drive magnet system can give rise to the formation of PTFE particles caused by abrasion between stirrer magnet and the container base.