The Dynalon 304415-0006 Blue Teflon Octagonal Stir Bar is a set of four reusable stir bars designed for use in scientific experiments and reactions. These stir bars are made of durable Teflon material and feature an octagonal shape for efficient mixing. The blue color adds a touch of vibrancy to your lab setup while also making it easy to locate during use. Perfect for chemistry and biology students or professionals in need of high-quality mixing tools for their research.