Southwire SIMpull 64162104 Thermostat Wire, 18 AWG Wire, 2-Conductor, Copper Conductor, Plastic Insulation, 150 V | Southwire SIMpull Thermostat Wire, Type CL-2, Wire Size: 18 AWG, 100 ft L, Number of Conductors: 2, Conductor Material: Copper, Conductor Insulation: Plastic, Stranded/Solid: Solid, Sheath Material: PVC, Sheath Color: Brown, 150 V, Resistance: Moisture, Sunlight, Operating Temperature: -20 to 60 deg C