Features It has the advantages of wear resistance, high temperature resistance and chemical corrosion resistance. 7 B-type PTFE laboratory magnetic stirring bars with high quality and stable performance. It has the characteristics of low temperature resistance, high reliability and good mechanical toughness. Choose the right magnetic stir bar to work perfectly and avoid jumping while you work. Ideal for stirring liquids or solutions in scientific research, industry, agriculture, health and medicine. Features: -It has the advantages of wear resistance, high temperature resistance and chemical corrosion resistance. -7 B-type PTFE laboratory magnetic stirring bars with high quality and stable performance. -It has the characteristics of low temperature resistance, high reliability and good mechanical toughness. -Choose the right magnetic stir bar to work perfectly and avoid jumping while you work. -Ideal for stirring liquids or solutions 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 Package List