MPD Digital 50 ft Ham / CB Radio Antenna Coax LMR-400 50 ohm Coaxial Cable Antenna Transmission Line PL-259 Connectors MADE IN THE USA LMR400 LMR-400 is a Registered Trademark of MPD Digital Systems PL-259 UHF coax cable connectors - Connects Antennas, Receivers, Meters and Radio transmitters 50 feet of coaxial cable USA Made LMR-400 Transmission Line Coaxial Cable with Soldered Silver Plated Connectors Teflon Dielectrics Assembled by MPD Digital - a DoD Supplier - in our GA Facility using MILSPEC Components Impedance 50 Ohms Frequency Range DC ~ 11 GHz - PL-259 Connectors are not recommended for use above 300Mhz (See N Male options)