Coleman Cable 55303BL07 18/3 Solid CL2 50-Feet Thermostat Cable, Brown Intended for use with low-voltage remote circuits, doorbells, alarm systems and more PVC jacket, polypropylene insulation ensures excellent strip ability 18/3 type CL2 solid thermostat cable, consisting of three bare copper wires with jacket 50-feet allows for flexibility for use in thermostat control applications Industry approvals: C(ETL)us CL2, UL Listed, CSA listed