Times Microwave LMR-400 Coax 18 inch Ham or CB Radio Jumper Coaxial UHF VHF HF Cable PL-259 Connectors - Made in USA - This is Genuine US Made LMR400 LMR-400 - a Registered Trademark of Times Microwave Systems PL-259 UHF coax cable connectors - Connects Antennas, Receivers, Meters and Radio transmitters 18 inches 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 Componants Impedance 50 Ohms Frequency Range DC ~ 11 GHz - PL-259 Connectors are not recomended for use above 300Mhz (See N Male options)