Features The solid material has the smallest surface tension, high and low temperature resistance, corrosion resistance, and non-toxicity. How to use: Put the tetrafluoro stirring mixer into the magnetic stirrer, and stir or heat at the same time. Refined from PTFE and high-quality permanent magnets, it has the advantages of wear resistance, high temperature resistance, chemical corrosion resistance, and stable operation. Non-toxic: It is physiologically inert, such as artificial blood vessels and organs implanted in the body for a long time without adverse reactions. Widely used in petroleum, pharmaceutical and chemical education research, analysis room for stirring solutions. Features: -The solid material has the smallest surface tension, high and low temperature resistance, corrosion resistance, and non-toxicity. -How to use: Put the tetrafluoro stirring mixer into the magnetic stirrer, and stir or heat at the same time. -Refined from PTFE and high-quality permanent magnets, it has the advantages of wear resistance, high temperature resistance, chemical corrosion resistance, and stable operation. -Non-toxic: It is physiologically inert, such as artificial blood vessels and organs implanted in the body for a long time without adverse reactions. -Widely used in petroleum, pharmaceutical and chemical education research, analysis room for stirring solutions. Specification: Condition:100% Brand New Material: PTFE and high-quality permanent magnet magnet Color: As shown in the picture Size: Approx. 4x8mm / 0.2x0.3in 5x10mm / 0.2x0.4in 6x15mm / 0.2x0.6in 7x25mm / 0.3x1.0in 7x20mm / 0.3x0.8in 9x28mm / 0.4x1.1in 8x30mm / 0.3x1.2in 9x35mm / 0.4x1.4in (Widest Diameter x Length ) Package List: 8 x Magnetic Stirrer Mixer Stir Bar Package List