Features: magnetic stir bar can resist high temperatures, corrosion, abrasion and high rotational forces, and has the properties of fine workmanship, no impurities and burrs on the surface, stable speed and no deviation Quality material: PTFE magnetic stirrer is made of PTFE and quality magnetic steel, and the cylindrical shape and smooth surface will reduce friction and improve smooth rotation More other applications: laboratory bar is widely applied in scientific research, universities, laboratories in the industrial and agricultural sectors, and also can be applied to stir mixed substances Widely applicable: stir plate magnet bar will work well with various types of magnetic stirrers or heating stirrers 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. Stir Bar Tips Proper speed is critical. Slowly increase your stir plate speed to find the stir bar's optimal performance. Turning the speed control up too fast can 'throw' the stir bar or might not spin it at all. Depending on your stir plate's magnet strength and the container you use, it may take a few tries to find the perfect working position. Check your stir plate specifications on optimal stir bar size. You may need to change sizes if you can't get the desired performance. Stir bar magnets are delicate. Dropping one could degrade the magnet's strength or the resiliency of the soft PTFE plastic.