Fishing Equipment
American Fishing Wire Surfstrand Copper 1x7 Bare Trolling Wire, Copper Color, 30 Pound Test, 300-Feet
Bare, 7 Strand copper wire construction 13% Greater Density than 1x7 Stainless Steel Trolling Wire Increased strike rates when trolling in fresh water Positive ions in copper help attract fish Sinks faster than steel, allowing for a greater trolling...
https://www.bizrate.co.uk/fishingequipment/american-fishing-wire-surfstrand-copper-oid28174860311.html