PREMIUM OXYGEN FREE COPPER (OFC) 4-CONDUCTOR WIRE - Use this Pro Series 12 gauge speaker wire that's build with high strand count, 4 conductors with color-coded PVC for easy polarity identification for your bi-wiring or bi-amping projects. UL CL2 RATED FOR CUSTOM INSTALLATIONS - You can make sure you get the highest safety standard when you use this GearIT Pro Series UL 12 gauge copper wire for In-wall installation or to pair with banana plugs, spade tips, or bent pin connectors to connect your speakers to your A/V receiver or amplifier with this GearIT Pro Series speaker wire. ADVANTAGE OF OFC (OXYGEN FREE COPPER) - With copper speaker wires you will have increased conductivity to carry more current to your amplifier. Also help reduced the strain on the vehicles electrical system which OFC oxygen free copper is highly recommended when you are installing car speaker wire in the car. Much higher corrosion resistance and improved heat absorptions over CCA speaker wire. HIGHEST QUALITY MATERIAL AND TIER 1 MANUFACTURE PROCESS - The outdoor speaker wire is made of OFC Oxygen Free Copper, ensuring high fidelity sound quality and providing maximum's conductivity and durability without paying the additional cost. The ofc speaker wire 12 gauge go through many states of testing to ensure the highest performance and reliability of the products. PRO SERIES LIFETIME GURANTEED - We stands for the highest quality product and customer satisfaction. If you are not happy with the 12 awg speaker wire in anyway we offer an easy return policy. All product come with our top rated lifetime warranty service.