Features PTFE + Permanent Magnet Material: 7pcs type-B PTFE Laboratory Magnetic Stir Bar is made of PTFE + permanent magnet material with stable performance. Magnetic Stirring Rod: Choosing the correct magnetic stirring rod can make our work more efficient and perfect, and avoid jumping when working. Low Temperature Resistance: The laboratory magnetic stirrer has the characteristics of low temperature resistance, high reliability, and good mechanical toughness. It is a very practical stirring accessory. Application scenarios: Magnetic stirring bars are very suitable for stirring liquids or solutions in scientific research, industry, agriculture, health and medical research. Scratch Resistance: The surface of the magnetic stir bar is treated with special technology to be scratch resistant, while being manufactured under strict quality control standards. Features: 1.7pcs type-B PTFE laboratory magnetic stir bar with high quality and stable performance. 2.It features low temperature resistance, high reliability and good mechanical toughness. 3.Choose the correct magnetic stirring bar to make it work perfect and avoid jumping when working. 4.With the advantages of wear resistant, high temperature resistant. 5.Perfect for stir a liquid or solution in scientific research, industry, agriculture, health and medicine. Specification: Condition: 100% Brand New Material: PTFE + Permanent Magnet Use: Magnetic Stir Bar Size: Diameter (Widest) x Length Approx. 4 x 10 mm / 0.2 x 0.4 in Approx. 8 x 15 mm / 0.3 x 0.6 in Approx. 8 x 20 mm / 0.3 x 0.8 in Approx. 8 x 25 mm / 0.3 x 1.0 in Approx. 9 x 28 mm / 0.4 x 1.1 in Approx. 10 x 30 mm / 0.4 x 1.2 in Approx. 9 x 35 mm / 0.4 x 1.4 in Weight: Approx. 30g / 1.1 oz Package List: 7pcs x Magnetic Stir Bar Note: 1. Please allow 1-2 mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List