How to use: Place the magnetic stirrer in a beaker, graduated cylinder or other liquid container, place the container on the platform of the electromagnetic heating stirrer, and turn on the switch of the electromagnetic heating stirrer. The magnetic stirrer will generate a rotating force to drive the liquid to rotate quickly In this way, the liquid is fully mixed, and the liquid can be concentrated by heating. What's included in the package 10 PTFE magnetic stir bars in 1 package.The length of the stir bars is 30mm (1.18inch) and the outer diameter is 8mm. Product Features PTFE magnetic stir bar is made of PTFE and high quality magnetic steel,its shape is cylindrical,smooth surface,reduce friction and improves smooth rotation.Mixer Stir Bar is resistant to high temperatures, corrosion,abrasion and high rotational forces. Product use Laboratory Bar can be used with various types of magnetic stirrers or heating stirrers.Stir bars can be reused after cleaning. Widely used Stir Plate Magnet is widely used in scientific research, universities,laboratories in the industrial and agricultural sectors, and is often used to stir mixed liquids.