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100mm x 100mm Medium Field Paper
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Magnetic Field Viewer Card, Eddy Currents & Magnetic Fields: Educational Innovations, Inc.
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CMS Magnetics 4"x6" Green Magnetic Viewing Film - Magnet Paper for Showing Magnetic Field - Walmart.com
A magnetic field paper, used to see magnetic fields and pole patterns, on a device. : r/Damnthatsinteresting
Magne-View® Film - 6 in. Square (MVF0005)
Magnetic Viewing Film
Magnetic pole | physics | Britannica
Magnetic Viewing Film Supplier - Magnets - MPCO Magnetics
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50mm x 50mm Small Magnetic Field Viewing Paper - CuriousMinds.co.uk