Color Classification: A:203 upgrade line (silver-plated wire) a set of 3B:203 upgrade line (pure silver line) a set of 3C:205 upgrade line (silver-plated wire) a set of 2D:205 upgrade line (pure silver line) a set of 2E:203 upgrade line (oxygen-free copper wire) set of 3F:205 upgrade line (oxygen-free copper wire) set of 2OPPO UDP203/205 Blu-ray player is used for upgrading, all of which are made of silver solder and are manually made. Three kinds of wires can be selected: Single crystal copper silver-plated wire; Taiwan OCC oxygen-free copper wire; Dutch sterling silver wire; 8p digital power supply line length: 350mm6P analog power supply line length: 90mm