●OFC SPEAKER WIRE – SINUS LIVE OFC Speaker Wires use OFC(Oxygen Free Copper)material, that have 99.97% copper , but normal copper only have about 60-70% copper. We offer very good signal frequency and corrosion resistance. ●SOFT TOUCH JACKET - The jacket on our cable is designed with the installer in mind. The flexibility of this jacket allows for easy routing and has a low memory. ●EASY POLARITY IDENTIFICATION - This two-color jacket allows for easy polarity identification. Making a polarity mistake could be damaging to your audio equipment.Black and purple looks very nice! ●CUSTOM INSTALLATIONS – Cable specification is 66 x 0.12mm OFC, PVC OD = 3+3MM.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 KCT Series speaker wire. ●This product go through many states of testing to ensure the very good performance and reliability of the products.