Unified Copper 16/4 audio cable, 16 AWG, 4 conductor, oxygen free copper, 500', white. Unified Copper™’s commitment to produce the utmost quality cables are shown in our line of Audio/Speaker cables. Mostly used for communication and signal control systems, our premium cables have been tested and approved by UL. • UL Listed for use in Riser (Passes UL 1666 Flame Test) • UL Listed to UL 444 (CMR) • RoHS compliant • High Strand Oxygen Free Copper • Outer jacket material: PVC • Installation-rated speaker cable • Large mouth opening • 500 feet sturdy pull boxes 16 AWG 4 Oxygen Free Copper conductors