  Brass shell casings. 
This is a collection of assorted shell casings made of brass (a copper-zinc alloy).  In use, casings like this would be filled with gunpowder or other propellent, with a projectile (bullet) fastened in the open end. 
Source: Derek McKinley 
Contributor: Derek McKinley 
Acquired: 13 February, 2007 
Text Updated: 14 February, 2007 
Price: Donated 
Size: 2" 
Composition: CuZn
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