Can anyone help me ID these fancy power cables?

Can anyone help me identify these fancy power cables? I am just curious what they probably originally sold for. They came with a used pair of Bryston 7B ST amps I just bought (seller didn't remember). "Element Cable" appears to be out of business as a company. They are ~5 ft long.

Thanks


https://i.imgur.com/y1H8Fbth.jpg