Features: Magnetic stir bar resists high temperatures, corrosion, abrasion, and high rotational forces. It has fine workmanship with no impurities or burrs on the surface, ensuring stable speed and no deviation. Quality material: PTFE magnetic stirrer is made of PTFE and high-quality magnetic steel. The cylindrical shape and smooth surface reduce friction and improve smooth rotation. Multiple applications: Laboratory stir bar is widely used in scientific research, universities, and laboratories in industrial and agricultural sectors. It can also be used to mix various substances. Wide compatibility: Stir plate magnet bar works well with various types of magnetic stirrers or heating stirrers. How to use: Place the stir bar inside a container of liquid or solution that is seated on a magnetic stirrer. Use a rotating magnet or multiple stationary electromagnets to create a rotating magnetic field. Chemical resistance: The laboratory bar offers acid resistance, stability, and tolerance to organic solvents. It is nearly insoluble in solvents. Maximum operating temperature is 250C; minimum is -196C. Design: Rod magnetic mixer is made of high-quality PTFE. Its cylindrical shape and smooth surface help reduce friction and ensure smooth rotation, ideal for laboratory use. Color: White Material: PTFE Size: 8 x 30mm Package Contents: 16 x Magnetic stir bar Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3cm.