Bel-Art Spinpak Magnetic Teflon Stir Bar Assortment 371600000

- Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
- Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
- Built-in pivot ring helps reduce vibration and wear during stirring
- Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
- Contains six stir bars, two each in the following sizes: 25.4 x 8 mm (1 x 0.3125"), 38.1 x 8 mm (1.5 x 0.3125"), 50.8 x 8 mm (2 x 0.3125")