Includes: 25 feet of premium, CL2/R CMR Rated Brown thermostat wire 18/4 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 Quality Assurance: UL Listed and Includes a US manufacturers warranty Introducing the Thermostat Wire by THE CIMPLE CO This multi-functional premium 18 gauge solid copper wire is commonly used for low voltage control wiring for thermostat installations, HVAC equipment (air conditioning, heat pumps), doorbell and security alarm systems. It is specifically designed for power limited circuits and depends on conductors that can handle the circuit's power requirements. FEATURES: 18 AWG Available in 2, 3, 4, 5, 6, 7, and 8 Conductors Available in lengths between 10 and 200 feet Color: Brown Solid Copper Construction Standard UV and Sunlight Resistant Jacket Solid Type UL Listed, and CMR rated (better than CL2, CL3) Approved NEC Substitution for: CL3R (Class 3 Riser) CL2R (Class 2 Riser) CATVR CM CMG CL3 (Class 3) CL2 (Class 2) CATV CMX CL2X CL3X CATVX Will NOT replace CMP (Plenum) THE CIMPLE CO All of our high quality products are brought to you by our Family owned and operated company. We are located in Utah, "The Beehive State," here in America; where we have become a leading manufacturer and provider of high quality and durable electronic accessories along with OEM parts and replacements. Our products are backed by our amazing warranty and a satisfaction , including 100% US based customer assistance.