OFC 3.5mm JACK to JACK Cable ensures the highest quality with the maximum audio impact. If you require the best audio quality from your Jack cables look no further. The OFC JACK cable is specially designed with gold contacts and made from OFC (Oxygen Free Copper). OFC is produced by melting and casting copper under a near vacuum atmosphere to lower the residual oxygen content. This reduces corrosion and enhances conductivity. The alloy hoods are made from Zinc Alloy with a heavy duty, dark blue individually screened cable. The Complete Highest Quality OFC JACK Cable. Look for the rhinocables badge to ensure your guarantee of quality.