Product Details: new Feature1: Magnetic stir bar. For most chemicals and solvents, shows an inert, against acid and alkali, water and various organics solvents. Lightweight. Non-toxic, corrosion-resistant. Type: Type A Material: PTFE Color white Size:A4x8mm A6x10mm A7x15mm A8x20mm A9x25mm Delivery content: 1 x magnetic stir bar Feature2: Model-B PTFE Magnetic Stirrer Mixer Stir Bar Bear Up to 250 Model Size:B3x6mm B3x8mm B5x10mm Bear High Temperature: Working temperature up to 250 Corrosion: For most chemicals and solvents, showing inert, resistant to acid and alkali, water and various organics solvents High lubricity: The solid material is the lowest coefficient of friction Bear Low temperature: Good mechanical toughness, even at temperatures down to -196 , but also to maintain the elongation of 5% Not adhere: The solid material having a minimum surface tension of the material does not adhere to any Weather: Long-term exposure to the atmosphere, surface and performance remain unchanged, B06B plastics best aging life Non-toxic: With physical inertia, as a long-term implantation of artificial blood vessels and organs of the body without adverse reaction Package Including: PTFE Magnetic Stirrer Mixer Stir Bar x 1 Feature3: Model-C PTFE Magnetic Stirrer Mixer Stir Bar Bear Up to 250 Model Size:C6x20mm C6x10mm C7x20mm C5x15mm Quantiy:1Pcs Packing list: according to your choice of delivery