Description This stir bar is made of premium PTFE material, safe, acid alkali resistance. It used for helpingstir a liquid or solution in biological, chemical, research laboratory applications. Light weight Compact size, easy to use operate, simple conveneint. Features -Color: White-Material:PTFE - Size: 31.00X5.00X1.00cm/12.18X1.97X0.39in - Low-temperature resistance: a good mechanical toughness, even if the temperature dropped to -196 degree, 5% can also maintain the application rate. - For most of the chemicals solvents, showing inertia, the ability of strong acid alkali, aqua regia a variety of organic solvents. - Made of premium material for durable long lasting use. - Non-adhesion: with a solid material in the smallest surface tension, does not adhere to any substance. - Easy to use, suitable for personal or professional use. Packing list: 1 x Stirring Bar