Clear viewing of magnetic fields!Steel filings are sealed in a scratch-resistant, transparent viewing tray (3.44" D). Incl...
Clear viewing of magnetic fields!Steel filings are sealed in a scratch-resistant, transparent viewing tray (3.44" D). Included magnets (3⁄4" disc magnet and 1" bar magnet) are rubber coated to prevent tray scratches.
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Clear viewing of magnetic fields!Steel filings are sealed in a scratch-resistant, transparent viewing tray (3.44" D). Incl...