★ Polyethylene tetrafluoroethylene (PTFE) magnetic stir bars are made by sealing permanent magnets in PTFE material can withstand high temperatures. 

★ These stirring sticks have a pivot ring in the center. They are designed to hold an optimal position in containers with curved or uneven bottoms. The ring helps reduce vibration and wear, and reduces the effects of friction from contact with the vessel. 

★ Magnetic stir bars can be used with various types of magnetic stirrers or heating stirrers on the market. 

★ Stir sticks are widely used in scientific research, colleges and universities, industrial and agricultural laboratories and household use.