PTFE Magnetic Rare Earth Stir Bar, Oval

These Samarium-cobalt magnet stirrer bars use rare earth magnets to provide significantly increased magnetic strength compared to Alnico magnets and are almost totally resistant to demagnetization. They are identified by a carbon black spot, which is chemically inert. Oval shape works great for round bottom flasks. These stir bars are perfect for stirring viscous solutions at high temperatures. High magnetic coupling strength reduces frequency of spinout in the most vigorous applications. FDA Grade Teflon PTFE low friction coating is durable and inert