Discover this 18/8 20 ft. solid copper thermostat wire, perfect for multiple indoor and outdoor low - voltage applications. It features 18-Gauge 8-conductors, is CL2 and ETL compliant, with a temperature rating of -20°C to +60°C and a voltage rating of 150. The inner conductor is solid pure copper, and the insulator is premium PVC, providing great oxidation and corrosion resistance and high conductivity. The high - quality PVC jacket makes it waterproof and durable, suitable for harsh outdoor conditions. Use it for thermostat control, heating and A/C installations, doorbells, and more. With strict testing and high - grade standards, it offers a long service life, bringing convenience to your low - voltage projects.