Sound and Security Wire, Shielded, Riser, Stranded, Conductor Size 18 AWG, Number of Conductors 4, Nominal Outside Dia 0.187 In, Spool/Coil Length 500 Ft, Voltage 300, Color Gray, Stranding 7/26, Insulation Premium Grade S-R PVC, Vertical Tray Flame Test California State Fire Marshall Approved, Temp Range -4 to 167 F, Shielding Flexfoil Shield, Jacket Material PVC, Application Security, Intercom and Audio, NEC Article 725 Type CL3R, 800 Type CMR, RoHS Compliant Directive 2002/95/EC Sound, Alarm, and Security Cable, Types CMR and CMPSecurity and Alarm CableRiserRipcord included. 500-ft., 22-ga. unshielded riser cable 1ATD8, 1ATJ1, 1ATG9, and 1ATJ2 are NEC Article 800 Type CMR/CMX, temp. range to 140 F.For burglar alarms, intercoms, PA systems, and sound systems. Stranded or solid bare copper conductor per ASTM B-3, B-8, and B-286. Jacket has sequential footage markings to facilitate installation. UL Listed and California State Fire Marshall Approved. Shielded cable has an aluminum/polyester Flexfoil shield with stranded, tinned-copper drain wire.Compliance: NEC Article 800 Type CMR and Article 725 Type CL3R, except 500-ft. 22-ga. unshielded riser Temp. range: -4 to 167 F, except 500-ft. 22-ga. unshielded riser Rated for 300V