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Ten white octagonal PTFE-coated stirring bars with Alnico V magnets 7.93 mm diameter 22 mm length

Lab Safety Supply Inc

Lab Safety Supply Inc 21R569 Octagonal Stirring Bar 7.93 mm PK10

SKU CH-MHNX-D5YBA

Pack of ten octagonal PTFE-coated stirring bars with Alnico V magnets, each 7.93 mm in diameter and 22 mm long

  • Product typeAssortments & Kits
  • Octagonal shape prevents slipping in vessels
  • Alnico V magnet provides strong coupling with stirrers
  • PTFE coating resists chemicals and high temperatures
  • White colour allows visual tracking of stirring action
  • Pack of 10 bars supports high-throughput lab workflows

Octagonal PTFE-coated stirring bars

This pack contains ten white octagonal stirring bars with an Alnico V magnet core and PTFE coating. Each bar measures 7.93 mm in diameter and 22 mm in overall length. They are designed for general laboratory mixing tasks.

Chemical resistance and thermal stability

The PTFE coating provides broad chemical resistance and a non-stick surface for easy cleaning. Alnico V magnetic material retains its strength across a wide temperature range. The coating also minimises friction against glassware during operation.

Pack of ten for routine lab workflows

The ten-piece quantity supports high-throughput benches or multiple simultaneous experiments. No additional accessories are required beyond a compatible magnetic stirrer. Buyers needing larger diameters or different shapes should select an alternative listing.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $33.99
Cheaper than about 63% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameLAB SAFETY SUPPLY
Product typeAssortments & Kits

Questions about this item

How do I place the 7.93 mm octagonal stir bar correctly in my flask?

Drop the PTFE-coated Alnico V bar into the vessel before adding liquid; its octagonal profile prevents rolling so the magnetic coupling stays centred as the stir plate ramps up.

When should I replace one of the 10 bars in the pack?

Replace a bar if the white PTFE coating shows deep scratches, chips or discoloration that could expose the Alnico V core to chemical attack.

What is the first limit I hit when running the 22 mm octagonal bar at high speed for long periods?

The 7.93 mm diameter and 22 mm length set the maximum torque the magnetic coupling can transmit; beyond that the bar decouples and stops stirring.

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