Security Alarm Cable: Cable Type - Sound/Audio; Jacket Material - PVC; Jacket Color - Gray; Shielding - Overall Aluminum Mylar; Voltage - 600V; Conductor Material - CU; Conductor Strands - 16 x 30; Conductor Size - 18; Conductor Count - 2; Nominal OD - 0.218"; Temperature Rating - -20 to 105 degC