20mm magnetic stir bars from China are widely used for laboratory mixing in biology, chemistry, and research applications. They typically feature a powerful permanent magnet (Alnico or Neodymium) encapsulated in a durable, chemically inert PTFE (Teflon) coating.

Key Specifications

• Dimensions: Approximately 20mm in length, with diameters typically ranging from 6mm to 8mm.
• Chemical Resistance: Highly resistant to corrosive chemicals, acids, and alkalis.
• Common Shapes:
  • Cylindrical/Type B: Smooth and standard for general use.
  • With Pivot Ring: Features a center ridge to reduce friction and improve stability on flat-bottomed containers.