The cables make a really sophisticated look, the plug snaps well and does not hang limply around like in some cheap models. It is a 100% tight plastic envelope from GB, the delivery time is shorter than expected and the shipping costs are also considerably cheaper than many shippers from Germany. Here, the shipping costs are actually shipping and are not used as a second source of income! The polarity L / R can be recognized by a red or black print, it is thus perhaps not as immediately clear as with the usual standard connectors with colored plastic sheath. But one such plug Stoppers also not half-hour on / off. What the term "pure copper" actually says, I can not judge. The cable works for me ok definitely 100%!