Check the listing for details. Solid Insulated Wire Electric Fence Underground Connector. Condition: New – Open box, Made in China. Listed at 10.00 USD. The Solid Insulated Wire Electric Fence Underground Connector is a durable and reliable fencing solution for agricultural and industrial use. This electric fencing component is designed to provide a secure and efficient way to contain livestock or protect property. The solid insulated wire ensures that the electric fence remains functional underground, even in challenging weather conditions. Perfect for farmers and ranchers looking to reinforce their fencing system, this connector offers peace of mind and security for their animals and property. Used for underground section of electric fence for dogs. Very stiff, this is leftovers. Bought from Home Depot or Lowe’s. Has to be more than 10 feet, maybe 20. Unsure of gauge.