  Electrodes.
I got these tantalum electrodes on eBay. How do I know they are really tantalum? Because I trust in the basic goodness of the eBay community and have no doubt that every item is exactly what it's claimed to be, especially the elements.
Source: eBay seller snooj
Contributor: Theodore Gray
Acquired: 22 August, 2002
Price: $10
Size: 0.2"
Purity: >90%
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