RG178B/U coaxial cable features a stranded, copper-clad steel conductor, polytetrafluoroethylene (PTFE) dielectric, and a fluorinated ethylene propylene (FEP) jacket. It also has an overall silver-coated copper braid shield for signal protection.
This cable meets mil-spec M17/93-RG178 and may be used up to 1000 volts. RG178B/U cable has a temperature range of -55°C to 200°C.
This coax is used in radio frequency and data transmission applications, like many other coaxial cables.
For more information on RG178B/U cable and other coaxial cables, you can see product specifications, here: http://www.awcwire.com/ProductTOC.aspx?id=Coaxial-Cable