Thermostat Wire, Solid, 8 Conductors, #18 Awg Conductor Size, 300 V RMS, 250 FT Overall Length, 0.21 In Outside Diameter, 0.006 In Insulation Thickness, Copper Conductor Material, Polypropylene Insulation Material, Brown, -20 °C Operating Temperature, +75 °C Operating Temperature, 50 LB/MFT