Unistrand rg178b u brown fep coaxial cable 100m unistrand 3240 p the unistrand rg178b u brown fep coaxial cable is a low dielectric fep material and is extruded creating electrical performance advantages p p it is usually used for communication and signal control systems the cable has been manufactured to provide the highest performance and ease of installation in all applications p unistrand 3240 rg178b u brown fep coaxial cable 100m