[7 SHAPES OF STIR BARS & 1 MAGNETIC RETRIEVER FIT ALL YOUR NEEDS] This stir bar set is professional-grade laboratory equipment. Stir bars in multiple shapes create greater turbulence and stronger vortex for efficient mixing. Includes 1 magnetic retriever for easy stir bar retrieval after use, helping avoid contamination from direct contact with solvents. [PTFE COATING] The stir bars are coated with PTFE, making them chemically resistant and suitable for use with a wide range of chemicals. The PTFE coating helps minimize friction and wear during stirring. [NON-ADHESIVE] Designed with a built-in pivot ring, the magnetic stir bars rotate smoothly and evenly in solvents, reducing vibration and preventing adhesion to solvents. [WIDE TEMPERATURE TOLERANCE] These magnetic stir bars maintain mechanical strength and flexibility within a temperature range of -196°C to 250°C. They retain performance with 5% elongation even at temperature extremes. [WIDE CHEMICAL COMPATIBILITY] Suitable for use in most solvents, these stir bars offer high inertness, resistance to corrosion, and non-adhesive properties. Color: White Material: PTFE Package Contents: 1 x Oval stir bar 9x25mm 1 x Gear shape stir bar 7x40mm 1 x Olive stir bar 12x26mm 1 x Octagonal stir bar 9x30mm 1 x Cylindrical with ring stir bar 9x28mm 1 x Cylindrical stir bar 8x35mm 1 x Spear-shaped stir bar 10x40mm 1 x Magnetic Retriever 9x250mm Only the items listed above are included. Note: Lighting and display settings may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.