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3D3DCopper scrubbing pad.
This is a copper-plated scouring pad. I'm not sure what the copper is plated over, but I would guess iron.
Source: Walmart
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009
Price: $2
Size: 3"
Purity: 1%
Copper