4.4 ounces of mystery metals 1/4" bars (rods) 3 are probably solder, 1 is harder

Description

Exact item shown, 4.4 ounces totatl weight - the more silver colored bars look like 60/40 solder (or 50/50, I suppose), they melt with my soldering iron and are flexible like 60/40.  the darker gray bar does not melt with the soldering iron and is much stiffer, and if you look at the end and the way it fractures, it's much harder - I don't know what that is.  the longest bar is 12 inches.  if you don't mind me bending it, I can ship in an envelope as priced.  if you don't want me to bend the long rod, then I'll have to ship more expensively, please ask before buying.
Note to me: 4th thin drawer
I normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box.
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