RJ45 plugs with a 50 micron gold plating and 100% bare copper wire make up SF Cable patch cables. Why is 50 microns? We don't utilize aluminum wire, or CCA. CCA: What is it? Up to 550 Mhz and beyond, our Cat6 550 Mhz Snagless Patch Cables can manage bandwidth-intensive applications. Visit: https://www.sfcable.com/10ft-cat6-shielded-stp-ethernet-network-cable-black.html