  Mini tin-lead casting alloy ingots. 
I'm pretty sure this is some kind of tin-lead alloy, it came with a set of tin soldier molds I got on eBay years ago.  You're meant to break off as much as you need for the soldiers you want to cast.  The whole thing is tiny, each bar is less than half an inch wide. 
Source: eBay 
Contributor: Theodore Gray 
Acquired: 28 February, 2009 
Text Updated: 1 March, 2009 
Price: Unknown 
Size: 3" 
Purity: <80%
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