Magnetic Stir Bars10 Pcs PTFE Magnetic Stirrer Mixer Stir Bar 20 Mm/ 0.8 Inch 

• Package Included：Size: 6.4mm×20mm/0.8 inches. Quantity: 10 pieces, shape: cylinder with pivot ring shape
• DURABLE MATERIAL：Stir stick is made of Teflon and high-quality magnet. It is not easily demagnetized and lasts longer than other stir bars
• Scientific Design：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
• Precautions for Use：The lab stick is chemical resistant; the highest temperature is 250 degrees Celsius and the lowest temperature is -196 degrees Celsius
• Wide range of uses：Stir sticks are widely used in scientific research, colleges and universities, industrial and agricultural laboratories and household use