Choosing a magnetic stir bar (also known as magnetic fleas) which is the right shape and size for your task can make the stirring action much more effective.

Use our guide below to choose a suitable magnetic stirring bar…

Choosing the right shape of magnetic stir bar will ensure the mixing is efficient and reduce wear and abrasion of the PTFE coating.

Image	Name	Applications
	Cylindrical Stir Bar	General purpose stirrer for smooth stirring
	Plain Stir Bar	Similar to cylindrical, but with more turbulence at low speed.
	Pivot Ring Stir Bar	For use where the container base is slightly curved or uneven. The pivot lets the stir bar adopt the optimum position for stirring.
	Octahedral Stir Bar	Similar to the pivot ring type, but with more turbulence at low speed.
	Spherical Stir Bar	For stirring in test tubes or eccentric stirring
	Oval Stir Bar	For use in round bottom flasks (aka boiling flasks)
	Cross Stir Bar	Suitable for general purpose stirring but very stable to reduce “jumping”
	Crosshead Stir Bar	For use in tube shaped containers or other containers – ideal when working in both test tubes and beakers or flasks.
	Triangular Stir Bar	For dissolving solids or mixing of sediments. The flat base gives a scraping action for disturbing solids.

For more information on PTFE magnetic stir bars, just follow the links above or contact us