How to : you can place inside a container of liquid or solution is seated on a magnetic stirrer, and a rotating magnet or multiple stationary electromagnets to create a rotating magnetic field Wide application: the stir plate magnet bar can work with various types of magnetic stirrers or heating stirrers, and is often applied to stir a liquid or solution in scientific research, universities and laboratories Features: the laboratory bar has acid and stability as as organic solvent tolerance, and is almost insoluble in solvents; The maximum temperature is 250 degrees centigrade and the minimum temperature is -196 degrees centigrade Quality material: the rod magnetic mixer is made of quality PTFE, and cylindrical shape and smooth surface will reduce friction and smooth , for laboratory size:8x25mm Material:PTFE colour:White Package Contents: 16 * PTFE magnetic stirrer mixer stir Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.