DescriptionThe stir bar is placed inside a container of liquid or solution that is seated on a magnetic stirrer, creating a rotating magnetic field using a rotating magnet or multiple stationary electromagnets.Features- Material:PTFE. - Size:5.00X1.70X1.70cm/1.97X0.67X0.67inch.- With operating temperature up to 250 , acid and alkali stability as well as organic solvent tolerance. - Fine workmanship, no impurities and burrs on the surface, stable speeds and no deviation. - A solid material minimum surface tension, is not liable to any substance. - You will get enough PTFE magnetic stirrer mixer stir bars to meet your needs. - Used to stir a liquid or solution in scientific research, universities and laboratories.