Octagonal stir bars have eight flat sides that provide more turbulence in flat-bottom vessels than polygon and cylindrical stir bars. Stir bars work with magnetic stirrers to mix solutions continuously or for extended periods of time without requiring constant attendance.

Cylindrical magnetic stir bars are rod-shaped for use in flat-bottom flasks. Stir bars work with magnetic stirrers to mix solutions continuously or for extended periods of time without requiring constant attendance.

Egg-shaped (sometimes called elliptical) stir bars have convex sides that fit the shape of round-bottom flasks to ensure effective stirring. Stir bars work with magnetic stirrers to mix solutions continuously or for extended periods of time without requiring constant attendance.

Micro stir bars fit small-volume vessels such as test tubes and vials. Stir bars work with magnetic stirrers to mix solutions continuously or for extended periods of time without requiring constant attendance.

Star-shaped stir bars provide a stable base and produce a deep vortex to mix liquids efficiently and quickly. Stir bars work with magnetic stirrers to mix solutions continuously or for extended periods of time without requiring constant attendance.

Stir bar retrievers have a magnetic end that lifts stir bars from vessels.

Stirring rods mix chemicals and solutions. They're made of chemically inert materials to prevent sample contamination.