2 fire and safety standards; which require pure bare copper wire in communications cables.Cat6A Ethernet Patch Cable - Snagless RJ45_ 550Mhz_ STP_ Pure Bare Cop Monoprice Ethernet cables are made of 100% pure bare copper wire; as opposed to copper clad aluminum (CCA) wire; and are therefore fully compliant with UL Code 444 and National Electrical Code TIA-568-C.