[7 SHAPES OF STIR BARS & 1 MAGNETIC RETRIEVER FIT ALL YOUR NEEDS] This stir bar set is professional equipment. Stir bars of various shapes create greater turbulence and stronger vortex. 1 piece retriever included for easy stir bar removal after mixing, avoiding contact with solvents. [PTFE MATERIAL] The stir bar is coated with PTFE, suitable for use with chemicals, helping reduce friction and wear during liquid stirring. [NON-ADHESIVE] Equipped with a built-in pivot ring, the magnetic stir bar performs well and spins smoothly in solvents without vibration or sticking. [WIDE TEMPERATURE RANGE] The magnetic stir bars maintain good mechanical toughness between -196°C and 250°C, and still perform well even at temperature extremes. [WIDE APPLICATION IN MOST SOLVENTS] The magnetic stirrer is compatible with most solvents, offering high inertia and resistance. It is also corrosion resistant and non-adhesive. Color: white Material: PTFE Package Contents: 1 * Oval stir bar 9x25mm 1 * Gear shape stir bar 7x40mm 1 * Olive stir bar 12x26mm 1 * Octagonal stir bar 9x30mm 1 * Cylindrical with ring stir bar 9x28mm 1 * Cylindrical stir bar 8x35mm 1 * Sharp stir bar 10x40mm 1 * Magnetic Retriever 9x250mm Only the above package content is included. Other products are not included. Note: Slight color differences may occur due to lighting and screen settings. A size measurement error of +/- 1-3cm may exist.