Fi-Shock 500-551 50-Foot Insulated Cable For above ground or below ground use Made of non-conductive high-density polyethylene Cable surrounds a 12-1/2 gauge 170,000 psi, class 3 galvanized wire 50 foot coil of cable Fi-Shock Energized Fencing provides safe, secure, superior quality electric fencing for all your animal containment and control needs