18/4 500FT 18AWG GAUGE 4 STRANDED CONDUCTOR UNSHIELDED WHITE CONTROL SECURITY BURGLAR ALARM WIRE SPEAKER CABLE CL2 Rated Stranded Unshielded 18-Gauge 500ft White 18/4 AWG Stranded Conductor. CCA (Copper Clad Aluminum). Polyvinyl Chloride (PVC) Easy tangle free pull box. Running feet printed every 2ft on the cable, makes measuring easy Use for Indoor applications RoHS Compliants, ISO-9001 Certified