SF Cable patch cables are made of 100% bare copper wire and 50 micron gold plated RJ45 plugs. Why 50 micron? We do not use CCA (aluminum wire). What is CCA? Our Enhanced Cat6 550Mhz Snagless Patch Cables will handle bandwidth intensive applications up to 550 Mhz and beyond.Flat cables fit easily between cramped spaces improving the look of your home or office because they are flat and easy to hide. These flat cables are a perfect fit under carpets, up walls, and even behind furniture. The cables are only a slim 1.2mm thick that gives a plenty of ventilation room for network rack wiring. It is a great advantage over fat cables that add more bulk to your work space.