This oval-shaped PTFE magnetic stir bar features a 15 mm maximum diameter at the center, gradually becoming slimmer toward the ends to ensure smooth and stable rotation during mixing. With a length of 40 mm, it is ideal for medium-sized laboratory vessels and offers reliable performance in various stirring applications. The PTFE coating provides excellent chemical resistance and withstands extreme temperatures from –200 °C to 260 °C. Technical Specifications Specification Value Shape Oval Length 40 mm Diameter 15 mm at the center (tapered ends) Material PTFE (Polytetrafluoroethylene) Temperature Resistance –200 °C to 260 °C Chemical Resistance Excellent Color White Surface Non-stick, low friction Suitable For Beakers, flasks, general lab mixing