Description These are PTFE coated magnetic stir bars, works perfect, these have been extremely valuable with mixing solutions together. Widely applied in scientific research, universities, laboratories in the industrial and agricultural sectors, and also can be applied to stir mixed substances. Features - Color:White. - Material:PTFE. - Size:3.00X0.50X0.50 cm/1.18X0.20X0.20 inch. - The maximum working temperature is up to 250 degrees Celsius. - Mixer stir bar is resistant to high temperatures, corrosion, abrasion and high rotational forces. - Stir bars are coated with PTFE covering, which is chemically inert. - Cylindrical shaped design, smooth surface, reduce friction and improve smooth rotation - Used to stir a liquid or solution in biological, chemical, and research laboratory applications.Packing list: 5 x Magnetic Stir Bars Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!