M213 Coax Cable, 50 ft., with PL-259 connector on one end and FME/PL-259 other end.  The smaller end with the FME connector allows the cable to more easily be pulled through the boat.  The PL-259 with FME is then screwed onto the cable. Our VHF and UHF antennas connect to the PL-259, as do most all marine radios.