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Precision steel micro-bearings.
An example of the element Iron

Sample Image
Iron Precision steel micro-bearings
Precision steel micro-bearings.
We think these balls are about 1/32-inch diameter. Ed Pegg reports that these particular balls were accidentally magnetized by noted physicist Stephen Wolfram, making them unsuitable for Ed's experiments.
Source: New England Miniature Ball Corp
Contributor: Ed Pegg Jr
Acquired: 15 April, 2002
Price: $5/1000 (which is not a lot of bearings)
Size: 0.03"
Purity: >95%
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