MPD Digital RG8x-W-so239-PL259-3ft Marine Radio VHF and Ais Antenna Extension Cable Made in the U.S.A. By FCC licensed ham radio operators - swept with bird site hawk sk-4000 TO assure VSWR less than 1: 1.35 Marine grade cable with silver Teflon UHF connectors is designed for 15 year outdoor exposure in harsh environments - when your life is at stake Buy coax that can be trusted. 60 Day Returns - plus a 1 year exchange for defects on all MPD Digital cable assemblies MPD Digital manufactures Cable assembly for Amazon. Oems & individual users. Customizable cables for RF use & list any cable on amazon. All cables manufactured under MPD Digital Trade marks. This is an ultra low loss Marine grade coaxial cable designed to be used for all shipboard radios and scanners where reliability and Ultra low loss Cable is required.