What is this copper thing?

[rastinirv]

Found this yesterday. Seems to be solid copper and it has many thin copper bands gathered together on either side. Is it an electrical thing? Thanks folks!

 

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[recondigger]

Looks like maybe from an old battery I don't know

Scouts out!

 

[Ism]

Looks like a "flexible bus bar" for a high current device like a welder where slight movement between two parts is required.
Do a web search and you will find manufacturers with similar pictures.