Alarm Wire Black 22 Gauge Copper Stranded 2 Conductor 500' Coil Pack UL Listed Stranded Copper, 22 Gauge 2 Conductor Full Copper Verified Compliant with EIA / TIA Standards by UL and ETL. Internal Colors are Red and Black. Length: 500ft Color: Black Because the wire pulls through the middle of the Coil Pack, installers can stack the Coil Packs and pull multiple wires in parallel for faster installation.