This affordable 3 inch ceramic bar magnet comes with marked North and South poles. It is made of Strontium Ferrite (ceremic) material and is great for demonstration and experimentation.
Magnet size: 3 x 0.5 x 0.25 inches (75 mm x 12 mm x 6 mm)
This magnet has a strength of: 800 Gauss (0.08 T)
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Provides the power to execute all the basic electrostatic demonstrations on an energetic and dramatic scale with up to 350,000 volts!