1)4 cores 2)Bare copper or tinned ... system, internal connecting sensors, control panels Shielded/Unshielded Alarm Cable: 1> Conductor: Bare copper or tinned copper or ... : PVC-flame proof 3> Cable cores: 2, 4, 6, 8, 12,...,50 are available 4> Shield: Al/polyester foil ... spool, 300m/wooden spool 9> Application: used for alarm mechanisms or security systemElectrical PropertiesTemperature Rating: -20°C ...