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3D3DFine wire.
This is really, really fine tungsten wire: 0.0025 inches diameter. It's quite strong, but what's really surprising as usual is how heavy the spool is. I need to figure out something to do with it, like hang a picture, because I've got 5000 feet of it.
Source: eBay seller 7890inky
Contributor: Theodore Gray
Acquired: 23 July, 2002
Price: $22
Size: 2.5"
Purity: >99%