Each conductor, stranded bare copper, paper separator, color coded rubber or plastic insulation, filler [where necessary] separator, tough thermoplastic jacket.For power line requirement where rough usage is indicated as for amplifiers, sound systems, speakers, vacuum cleaners, washing machines, trouble lights, refrigerators, etc. Color coded. Underwriters approved, neoprene and plastic construction recommended for equipment exposed to oil, acids outdoor use, direct burial, etc.