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. 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.