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3D3DTungsten carbide ring.
Ed Pegg found a great source in China that makes and sells tungsten carbide rings, including custom-made shapes, for ridiculously low prices.
Source: Ed Pegg Jr
Contributor: Ed Pegg Jr
Acquired: 4 September, 2007
Text Updated: 3 September, 2007
Price: Donated
Size: 1"
Purity: 97%