5N OFC(99.9993% Oxygen Free Copper Wire) OXYGEN-FREE COPPER (OFC) - Oxygen Free Copper wiring provides a superior electrical conductor to aluminum because it does not expand or contract with heat and can carry a higher current load. PREMINUM SPEAKER WIRE –VKheroKV Mukjipa-Cable-04 Use this Speaker Wire Cable that's build quality stranded conductors to build this professional grade speaker wire audio cable. CUSTOM INSTALLATIONS – You can use this speaker wire to pair with banana plugs, spade tips, or bent pin connectors to connect your speakers to your A/V receiver or amplifier with this VKheroKV Mukjipa-Cable-04 speaker wire. We stands for the highest quality product and customer satisfaction. If you are not happy with the product in anyway we offer an easy return policy. Construction: 105/0.254±0.012(Wire core)*2 Conductors, Conductor Resistance:≤3.4Ω /KM, Insulation Resistance:DC500V 100MΩ・m, Min Dielectric strength:AC. 2500VAC/1min