300m Underground Electric Shock Pet Dog Fence System Boundary Coil Wire Cable. Specifications: 300m boundary wire for use in underground pet fence system. Can be used as buried wire or for above-ground installation. It is specially resistant to sunlight, moisture, ground rot and corrosion. Item Name: Underground Fence Cable Material: Teflon Features: Durable, Space Saving, Waterproof, Dog Training System Cable Length: 300m/984.25ft, Core Wire Diameter: 0.25mm/0.01'', External Wire Diameter: 0.45mm/0.02'' (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Roll of 300m Electric Fence Cable