Magnetic stirring bar, very strong, for large stirring volumes, viscous media, stirring over wide distances or for disadvantageous vessel bottoms, 4 x higher torque transmissible, unbeatable increased mixing effect, significantly higher rotation speed reachable, concave design for a min. of bearing surface and reliable rotation, triangular shape for powerful shear force, better mixing effect at lower rotation speed, 300 % less PTFE abrasion, better mixing effect at lower speed, high quality, even and sealed PTFE cover, FDA-conform, steam sterilisable at 121 °C, no demagnetisation effect, multiple improved performances for all types of magnetic stirrers.