Safety and Packaging: Each stir bar is non- and features a smooth, non-adhesive that prevents contamination and ensures easy cleaning. They come in a neat and attractive plastic bag, ensuring they remain clean and secure until use, reflecting their quality and your value for excellence. Non-Adhesive: Features the smallest tension in solid materials, preventing adhesion to any substances. Material and Durability: Crafted from premium Polyetrafluoroethylene (PTFE), these stir bars boast a pure white color and offer exceptional durability. They are to high and low temperatures, adverse weather conditions, and chemical reactions, making them ideal for rigorous scientific use. Quantity and Dimensions: This package includes 3 high-quality PTFE magnetic stirrer bars, each measuring 40x7mm (diameter x length). Designed in a eight-gear shape, these bars efficient and thorough mixing for various laboratory applications. Resistance: Exhibits excellent resistance to most chemicals and solvents, including strong acids and alkalis, as well as water and various organic solvents, Weight: 0.661386786 Pounds, Manufacturer: Xnuiasqe