<Tr> <Td> 1 5 / 8" </Td> <Td> 41.3 mm </Td> <Td> 38.8 mm </Td> <Td> 16.9 mm </Td> <Td> 15.0 mm </Td> </Tr> <Tr> <Td> 3 1 / 8" </Td> <Td> 79.4 mm </Td> <Td> 76.9 mm </Td> <Td> 33.4 mm </Td> <Td> 31.3 mm </Td> </Tr> <Tr> <Td> 4 1 / 2" </Td> <Td> 106 mm </Td> <Td> 103 mm </Td> <Td> 44.8 mm </Td> <Td> 42.8 mm </Td> </Tr> <Tr> <Td> 6 1 / 8" </Td> <Td> 155.6 mm </Td> <Td> 151.9 mm </Td> <Td> 66.0 mm </Td> <Td> 64.0 mm </Td> </Tr>

What is the difference between rf and rg coaxial cable