Magnetic Mixer Magnetic Stirrer Bars 5pcs - PTFE Coated, Cylinder White, 7mm X 30mm Type C O 222525 High Temperature Stir Bars For Laboratory No Adhesiveness - Our PTFE magnetic stirrer bars have the lowest surface tension among solid materials, ensuring they won't stick to any substance and are easy to clean. High temperature resistance, the maximum working temperature is 250; Corrosion resistance, stirring bars are inert to most chemicals and solvents... Maximize Your Lab Efficiency - Our magnetic stirrer set includes 5 PTFE mixer bars with a Type-C white spinner, for mixing liquids quickly and efficiently. High lubrication, stir bars have the lowest friction coefficient among solid material. Features: High temperature resistance, maximum working temperature is up to 250℃. Corrosion resistance, stir bars are chemical inert to most chemicals and solvent, such as strong acid, alkali, water and organic solvent. 5. PTFE Magnetic Stirrer Bar Cylindrical Stir bar Type-C Magneton Laboratory Chemical Stirring Bars Mixer White Spin Bars , 10pcs · 12,27US $. 3 sold. C6x30mm... 7-Pack PTFE Magnetic Stir Bars - Laboratory Mixer Stirrer Set With Low temperature resistance, they have good mechanical toughness, and will keep 5% elongation even at -196℃.