500-ft Roll of 16-4 Pro Grade Audio Cable White. 16-gauge 4-conductor speaker wire in pull box. Professional-Grade Audio Cable for Exceptional Performance. Ideal for Digital/Analog Speaker and Home Theater Systems. Multiconductor cable reduces need to pull multiple wires. Superior Quality Stranded Copper Conductors. High-Strand-Count 16 or 18 AWG Wire for Excellent Audio Signal Transfer. Color-Coded Flame Retardant PVC Insulation. UL or ETL Listed – NEC Type CL3.