... shield c) Messenger d) Quad s RG RG MIL-C-17 Coaxial Cable RG-Type187 Structure 1Inner conductorØmmStCu-silverplated7×0. ... .8693000 MHz- Application ,,,,,.GHz.Coaxial cables are used in high frequency transmission, especially for transmitters and receivers, computers, ... PolyethyleneFPE- Physical foam polyethylenePFA- Perfluoroalkyl-Tetrafluoroethylene Copolymer RG 187 coaxial cable for communications