Features Features: magnetic stir bar is High temperature resistance, maximum working temperature is up to 250℃, corrosion, abrasion and high rotational forces, and has the properties of fine workmanship, no impurities and burrs on the surface, stable speed and no deviation PTFE Material: PTFE magnetic stirrer is made of PTFE and quality magnetic steel, and the cylindrical shape and smooth surface will reduce friction and improve smooth rotation Widely Application: High lubrication, stir bars have the lowest friction coefficient among solid material so it can applied in scientific research, universities, laboratories in the industrial and agricultural sectors, and also can be applied to stir mixed substances Wide Range Temperature: Low temperature resistance, they have good mechanical toughness, and will keep 5% elongation even at -196℃ Advantage: No adhesiveness, they have the lowest surface tension among solid material, and will not stick to any substance Specifications:Material: PTFE(Teflon)Type: CColor: WhiteSize: 5*15mm; C7: 7*30mm; C9: 9*30mm (Optional)Quantity: 5pcs Package Includes:5 x Stir Bars Package List