Fisherbrand™ PTFE-Coated Rare Earth Core Stir Bars, Cylindrical

Use for significantly increased magnetic strength and resistance to demagnetization. Rare earth stir bars are easily identified by a chemically inert carbon black spot.

Brand: Fisherbrand™

UNSPSC: 41122401

Code: 41

Additional Details:
Additional Details: Weight: 0.00400kg

Product Code. 11551953

Quantity Price
1 £ 13.21 / Pack of 5
In Stock 7
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Description and Specification


No. per Pack 2 Pack
For Use With Containers & Vessels / Stirrer Hot Plates
Diameter (Metric) 4.5mm
Length (Metric) 12mm
Autoclavable Yes
Certifications/Compliance Certificate of Conformance, Certificate of Analysis, Product Data Sheet, Material Safety Data Sheet (MSDS)
Coating PTFE
Product Type PTFE Stir Bars Cylindrical Rare Earth
Color White
Shape Cylindrical
Material PTFE encapsulated Samarium-Cobalt magnet core

  • Use rare earth magnets for significantly increased magnetic strength compared to those using AlNiCo magnets
  • Samarium-cobalt core is resistant to demagnetization
  • Identified by a chemically inert, carbon black spot
The high magnetic coupling power of rare earth stir bars may cause abrasion of the PTFE coating against the base of the container. When stirring arrays are used, as in multi-well plates, lateral interaction between stir bars may be observed.