50 Ohm Coaxial cables are used for RF (Radio Frequency) applications. The 50 Ohm impedance offers high power handling capability which makes this the coaxial cable of choice in the radio industry. RG213 is the high power, low loss size often used to feed RF radio towers and for long distance applications (refer CC213). RG58 is the small size often used to interconnect equipment (refer CC58). RG 174 is the micro size often used to interconnect miniature antennas to reception equipment, or to inter-connect RF test and RF equipment modules (refer CC174).