This coil wire is designed to work with an underground pet containment system to help keep your dog within a designated area. The 300m (984ft) length provides ample coverage for most yard sizes. Constructed from high-quality metal materials, the wire is durable and resistant to breaking under normal conditions. It features a single-strand copper design with a wire diameter of approximately 0.2mm and a total section size of about 0.6mm. This wire is compatible with models 023/227/227B electric pet fencing systems. Important Usage Information: - This wire must be used in conjunction with an electronic transmitter as part of a complete pet containment system; it cannot function alone. - For international versions of electronic transmitters, a thicker gauge wire may be required for optimal performance. Using a thinner wire may reduce signal strength, potentially leading to reduced receiver sensitivity and decreased effectiveness in containing your pet. - Some foreign-model systems are designed for thinner wires with lower output power. In such cases, the detection range may be limited to approximately 1 meter (3.3 feet), which could increase the risk of your pet crossing the boundary. Package Includes: 1 x Electric Dog Fence Wire