Bare, clean, uncoated, unalloyed copper pipe free of attachments.
Bare, clean, uncoated, unalloyed copper wire free of attachments. All insulation is removed from the wire and it is free of paint and solder.
Oxidized copper pipe with solder, attached brass fittings or a light tin coating.
Clean, plated, uncoated, unalloyed copper wire or bus bar free of attachments.
Sheet, roofing, gutter, or flashing copper with very little tar or attachments.
Sheet or roofing copper with a lead coating.
Sheet or roofing copper with heavy tar, wood, or other attachments.
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