Includes: 25 feet of premium, CL2/R CMR Rated Brown thermostat wire 18/8 Perfect For: This multi-purpose Cable is primarily used for thermostat installations, HVAC equipment, along with security alarm systems, door chimes and bell installations Premium Construction: Thermostat Cable is made from pure copper, and features bare solid 18 gauge copper conductors with a sunlight resistant outer jacket Rated for: Residential, Commercial, and Industrial applications UL Listed and Solid Construction, Designed to Last